231221023311102 has 64 divisors (see below), whose sum is σ = 518326410610944. Its totient is φ = 68145705872640.

The previous prime is 231221023311041. The next prime is 231221023311121. The reversal of 231221023311102 is 201113320122132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13104708 + ... + 25182839.

It is an arithmetic number, because the mean of its divisors is an integer number (8098850165796).

Almost surely, 2^{231221023311102} is an apocalyptic number.

231221023311102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231221023311102 is an abundant number, since it is smaller than the sum of its proper divisors (287105387299842).

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

231221023311102 is a wasteful number, since it uses less digits than its factorization.

231221023311102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38290073.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 231221023311102 its reverse (201113320122132), we get a palindrome (432334343433234).

The spelling of 231221023311102 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, twenty-three million, three hundred eleven thousand, one hundred two".