231302111020 has 48 divisors (see below), whose sum is σ = 501750321408. Its totient is φ = 89474330880.

The previous prime is 231302111003. The next prime is 231302111021. The reversal of 231302111020 is 20111203132.

It is a junction number, because it is equal to n+sod(n) for n = 231302110985 and 231302111003.

It is not an unprimeable number, because it can be changed into a prime (231302111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772482 + ... + 1029238.

It is an arithmetic number, because the mean of its divisors is an integer number (10453131696).

Almost surely, 2^231302111020 is an apocalyptic number.

231302111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231302111020 is an abundant number, since it is smaller than the sum of its proper divisors (270448210388).

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

231302111020 is a wasteful number, since it uses less digits than its factorization.

231302111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258250 (or 258248 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231302111020 its reverse (20111203132), we get a palindrome (251413314152).

The spelling of 231302111020 in words is "two hundred thirty-one billion, three hundred two million, one hundred eleven thousand, twenty".