3121122402 has 128 divisors (see below), whose sum is σ = 7402752000. Its totient is φ = 972734400.

The previous prime is 3121122391. The next prime is 3121122421. The reversal of 3121122402 is 2042211213.

It is a happy number.

3121122402 is a `hidden beast` number, since 31 + 211 + 22 + 402 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17436349 + ... + 17436527.

It is an arithmetic number, because the mean of its divisors is an integer number (57834000).

Almost surely, 2^3121122402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121122402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3701376000).

3121122402 is an abundant number, since it is smaller than the sum of its proper divisors (4281629598).

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

3121122402 is a wasteful number, since it uses less digits than its factorization.

3121122402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3121122402 is about 55867.0063812265. The cubic root of 3121122402 is about 1461.4039166716.

Adding to 3121122402 its reverse (2042211213), we get a palindrome (5163333615).

The spelling of 3121122402 in words is "three billion, one hundred twenty-one million, one hundred twenty-two thousand, four hundred two".