231011221100 has 36 divisors (see below), whose sum is σ = 546866566008. Its totient is φ = 84004080000.

The previous prime is 231011221087. The next prime is 231011221117. The reversal of 231011221100 is 1122110132.

It is a super-2 number, since 2×231011221100² (a number of 24 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 105004001 + ... + 105006200.

Almost surely, 2^231011221100 is an apocalyptic number.

231011221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231011221100 is an abundant number, since it is smaller than the sum of its proper divisors (315855344908).

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

231011221100 is a wasteful number, since it uses less digits than its factorization.

231011221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210010226 (or 210010219 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 231011221100 its reverse (1122110132), we get a palindrome (232133331232).

The spelling of 231011221100 in words is "two hundred thirty-one billion, eleven million, two hundred twenty-one thousand, one hundred".