2131321204 has 12 divisors (see below), whose sum is σ = 3820783428. Its totient is φ = 1039668800.

The previous prime is 2131321201. The next prime is 2131321211. The reversal of 2131321204 is 4021231312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56700900 + 2074620304 = 7530^2 + 45548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131321201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497767 + ... + 6498094.

It is an arithmetic number, because the mean of its divisors is an integer number (318398619).

Almost surely, 2^2131321204 is an apocalyptic number.

It is an amenable number.

2131321204 is a deficient number, since it is larger than the sum of its proper divisors (1689462224).

2131321204 is a wasteful number, since it uses less digits than its factorization.

2131321204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995906 (or 12995904 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2131321204 is about 46166.2344576640. The cubic root of 2131321204 is about 1286.9143251816.

Adding to 2131321204 its reverse (4021231312), we get a palindrome (6152552516).

The spelling of 2131321204 in words is "two billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred four".