231020111010220 has 192 divisors, whose sum is σ = 570746821478400. Its totient is φ = 76888611237888.

The previous prime is 231020111010211. The next prime is 231020111010229. The reversal of 231020111010220 is 22010111020132.

231020111010220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231020111010211) and next prime (231020111010229).

It is a junction number, because it is equal to n+sod(n) for n = 231020111010194 and 231020111010203.

It is not an unprimeable number, because it can be changed into a prime (231020111010229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4007327956 + ... + 4007385604.

It is an arithmetic number, because the mean of its divisors is an integer number (2972639695200).

Almost surely, 2^{231020111010220} is an apocalyptic number.

231020111010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231020111010220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285373410739200).

231020111010220 is an abundant number, since it is smaller than the sum of its proper divisors (339726710468180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231020111010220 is a wasteful number, since it uses less digits than its factorization.

231020111010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59472 (or 59470 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 231020111010220 its reverse (22010111020132), we get a palindrome (253030222030352).

The spelling of 231020111010220 in words is "two hundred thirty-one trillion, twenty billion, one hundred eleven million, ten thousand, two hundred twenty".