213131121002 has 8 divisors (see below), whose sum is σ = 320250750276. Its totient is φ = 106380870912.

The previous prime is 213131120977. The next prime is 213131121013. The reversal of 213131121002 is 200121131312.

It can be written as a sum of positive squares in 2 ways, for example, as 186780416761 + 26350704241 = 432181^2 + 162329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92343353 + ... + 92345660.

Almost surely, 2^213131121002 is an apocalyptic number.

213131121002 is a deficient number, since it is larger than the sum of its proper divisors (107119629274).

213131121002 is a wasteful number, since it uses less digits than its factorization.

213131121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184689592.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213131121002 its reverse (200121131312), we get a palindrome (413252252314).

The spelling of 213131121002 in words is "two hundred thirteen billion, one hundred thirty-one million, one hundred twenty-one thousand, two".