230121221100 has 72 divisors (see below), whose sum is σ = 667631935488. Its totient is φ = 61198420800.

The previous prime is 230121221081. The next prime is 230121221117. The reversal of 230121221100 is 1122121032.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 230121221100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 934956 + ... + 1155155.

Almost surely, 2^230121221100 is an apocalyptic number.

230121221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

230121221100 is an abundant number, since it is smaller than the sum of its proper divisors (437510714388).

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

230121221100 is a wasteful number, since it uses less digits than its factorization.

230121221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090495 (or 2090488 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 230121221100 its reverse (1122121032), we get a palindrome (231243342132).

The spelling of 230121221100 in words is "two hundred thirty billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred".