1231421251224 has 64 divisors (see below), whose sum is σ = 3174525204480. Its totient is φ = 397810080000.

The previous prime is 1231421251163. The next prime is 1231421251237. The reversal of 1231421251224 is 4221521241321.

It is a junction number, because it is equal to n+sod(n) for n = 1231421251191 and 1231421251200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3995272 + ... + 4292439.

It is an arithmetic number, because the mean of its divisors is an integer number (49601956320).

Almost surely, 2^{1231421251224} is an apocalyptic number.

It is an amenable number.

1231421251224 is an abundant number, since it is smaller than the sum of its proper divisors (1943103953256).

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

1231421251224 is a wasteful number, since it uses less digits than its factorization.

1231421251224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8287912 (or 8287908 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

Adding to 1231421251224 its reverse (4221521241321), we get a palindrome (5452942492545).

The spelling of 1231421251224 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-one million, two hundred fifty-one thousand, two hundred twenty-four".