3121230402 has 32 divisors (see below), whose sum is σ = 6939053760. Its totient is φ = 1039962240.

The previous prime is 3121230397. The next prime is 3121230407. The reversal of 3121230402 is 2040321213.

3121230402 is a `hidden beast` number, since 31 + 2 + 1 + 230 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (3121230397) and next prime (3121230407).

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

It is not an unprimeable number, because it can be changed into a prime (3121230407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128877 + ... + 151167.

It is an arithmetic number, because the mean of its divisors is an integer number (216845430).

Almost surely, 2^3121230402 is an apocalyptic number.

3121230402 is an abundant number, since it is smaller than the sum of its proper divisors (3817823358).

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

3121230402 is a wasteful number, since it uses less digits than its factorization.

3121230402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24895 (or 24889 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3121230402 is about 55867.9729540996. The cubic root of 3121230402 is about 1461.4207727661.

Adding to 3121230402 its reverse (2040321213), we get a palindrome (5161551615).

The spelling of 3121230402 in words is "three billion, one hundred twenty-one million, two hundred thirty thousand, four hundred two".