231221001031032 has 32 divisors (see below), whose sum is σ = 578055025429200. Its totient is φ = 77073330630144.

The previous prime is 231221001030979. The next prime is 231221001031063. The reversal of 231221001031032 is 230130100122132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15379233 + ... + 26437904.

Almost surely, 2^{231221001031032} is an apocalyptic number.

It is an amenable number.

231221001031032 is an abundant number, since it is smaller than the sum of its proper divisors (346834024398168).

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

231221001031032 is a wasteful number, since it uses less digits than its factorization.

231221001031032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42047535 (or 42047531 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231221001031032 its reverse (230130100122132), we get a palindrome (461351101153164).

The spelling of 231221001031032 in words is "two hundred thirty-one trillion, two hundred twenty-one billion, one million, thirty-one thousand, thirty-two".