1231220502 has 24 divisors (see below), whose sum is σ = 2694060720. Its totient is φ = 406342800.

The previous prime is 1231220489. The next prime is 1231220503. The reversal of 1231220502 is 2050221321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231220503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336802 + ... + 340437.

It is an arithmetic number, because the mean of its divisors is an integer number (112252530).

Almost surely, 2^1231220502 is an apocalyptic number.

1231220502 is an abundant number, since it is smaller than the sum of its proper divisors (1462840218).

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

1231220502 is a wasteful number, since it uses less digits than its factorization.

1231220502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677348 (or 677345 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1231220502 is about 35088.7517874318. The cubic root of 1231220502 is about 1071.7955417553.

Adding to 1231220502 its reverse (2050221321), we get a palindrome (3281441823).

The spelling of 1231220502 in words is "one billion, two hundred thirty-one million, two hundred twenty thousand, five hundred two".