213121203323013 has 24 divisors (see below), whose sum is σ = 308320807511808. Its totient is φ = 141859697938272.

The previous prime is 213121203323009. The next prime is 213121203323053. The reversal of 213121203323013 is 310323302121312.

213121203323013 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 1 + 20 + 332 + 301 + 3 = 666.

It is not a de Polignac number, because 213121203323013 - 2² = 213121203323009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121203323053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 938361895 + ... + 938588987.

It is an arithmetic number, because the mean of its divisors is an integer number (12846700312992).

Almost surely, 2^{213121203323013} is an apocalyptic number.

It is an amenable number.

213121203323013 is a deficient number, since it is larger than the sum of its proper divisors (95199604188795).

213121203323013 is a wasteful number, since it uses less digits than its factorization.

213121203323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388913 (or 388910 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 213121203323013 its reverse (310323302121312), we get a palindrome (523444505444325).

The spelling of 213121203323013 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred three million, three hundred twenty-three thousand, thirteen".