123331001221000 has 32 divisors (see below), whose sum is σ = 288594542859480. Its totient is φ = 49332400488000.

The previous prime is 123331001220989. The next prime is 123331001221093. The reversal of 123331001221000 is 122100133321.

It can be written as a sum of positive squares in 4 ways, for example, as 15672239957124 + 107658761263876 = 3958818^2 + 10375874^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61665499611 + ... + 61665501610.

Almost surely, 2^{123331001221000} is an apocalyptic number.

123331001221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123331001221000 is an abundant number, since it is smaller than the sum of its proper divisors (165263541638480).

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

123331001221000 is a wasteful number, since it uses less digits than its factorization.

123331001221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123331001242 (or 123331001228 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 123331001221000 its reverse (122100133321), we get a palindrome (123453101354321).

The spelling of 123331001221000 in words is "one hundred twenty-three trillion, three hundred thirty-one billion, one million, two hundred twenty-one thousand".