213131103121 has 8 divisors (see below), whose sum is σ = 225906541920. Its totient is φ = 200382143808.

The previous prime is 213131103079. The next prime is 213131103137. The reversal of 213131103121 is 121301131312.

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

It is a cyclic number.

It is not a de Polignac number, because 213131103121 - 2³⁵ = 178771364753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213131106121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6603291 + ... + 6635488.

It is an arithmetic number, because the mean of its divisors is an integer number (28238317740).

Almost surely, 2^213131103121 is an apocalyptic number.

It is an amenable number.

213131103121 is a deficient number, since it is larger than the sum of its proper divisors (12775438799).

213131103121 is a wasteful number, since it uses less digits than its factorization.

213131103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13239743.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 213131103121 its reverse (121301131312), we get a palindrome (334432234433).

The spelling of 213131103121 in words is "two hundred thirteen billion, one hundred thirty-one million, one hundred three thousand, one hundred twenty-one".