213131121003 has 12 divisors (see below), whose sum is σ = 307912694440. Its totient is φ = 142061276736.

The previous prime is 213131120977. The next prime is 213131121013. The reversal of 213131121003 is 300121131312.

It is not a de Polignac number, because 213131121003 - 2⁹ = 213131120491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213131121013) 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, 2126398 + ... + 2224371.

Almost surely, 2^213131121003 is an apocalyptic number.

213131121003 is a deficient number, since it is larger than the sum of its proper divisors (94781573437).

213131121003 is a wasteful number, since it uses less digits than its factorization.

213131121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356218 (or 4356215 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 213131121003 its reverse (300121131312), we get a palindrome (513252252315).

It can be divided in two parts, 21313 and 1121003, that added together give a triangular number (1142316 = T₁₅₁₁).

The spelling of 213131121003 in words is "two hundred thirteen billion, one hundred thirty-one million, one hundred twenty-one thousand, three".