231101020 has 12 divisors (see below), whose sum is σ = 485312184. Its totient is φ = 92440400.

The previous prime is 231100979. The next prime is 231101027. The reversal of 231101020 is 20101132.

231101020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 231100988 and 231101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5777506 + ... + 5777545.

It is an arithmetic number, because the mean of its divisors is an integer number (40442682).

Almost surely, 2^231101020 is an apocalyptic number.

231101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231101020 is an abundant number, since it is smaller than the sum of its proper divisors (254211164).

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

231101020 is a wasteful number, since it uses less digits than its factorization.

231101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11555060 (or 11555058 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 231101020 is about 15202.0071043267. The cubic root of 231101020 is about 613.6686736082.

Adding to 231101020 its reverse (20101132), we get a palindrome (251202152).

The spelling of 231101020 in words is "two hundred thirty-one million, one hundred one thousand, twenty".