231121030110020 has 96 divisors (see below), whose sum is σ = 488051873068032. Its totient is φ = 91936062816768.

The previous prime is 231121030109999. The next prime is 231121030110029. The reversal of 231121030110020 is 20011030121132.

It is not an unprimeable number, because it can be changed into a prime (231121030110029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16008930242 + ... + 16008944678.

It is an arithmetic number, because the mean of its divisors is an integer number (5083873677792).

Almost surely, 2^{231121030110020} is an apocalyptic number.

231121030110020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231121030110020 is an abundant number, since it is smaller than the sum of its proper divisors (256930842958012).

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

231121030110020 is a wasteful number, since it uses less digits than its factorization.

231121030110020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20637 (or 20635 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 231121030110020 its reverse (20011030121132), we get a palindrome (251132060231152).

The spelling of 231121030110020 in words is "two hundred thirty-one trillion, one hundred twenty-one billion, thirty million, one hundred ten thousand, twenty".