210023121213 has 32 divisors (see below), whose sum is σ = 313421940480. Its totient is φ = 138993433920.

The previous prime is 210023121181. The next prime is 210023121227. The reversal of 210023121213 is 312121320012.

210023121213 is a `hidden beast` number, since 210 + 0 + 231 + 212 + 13 = 666.

It is not a de Polignac number, because 210023121213 - 2⁵ = 210023121181 is a prime.

It is a super-2 number, since 2×210023121213² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210023121613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3053520 + ... + 3121542.

It is an arithmetic number, because the mean of its divisors is an integer number (9794435640).

Almost surely, 2^210023121213 is an apocalyptic number.

It is an amenable number.

210023121213 is a deficient number, since it is larger than the sum of its proper divisors (103398819267).

210023121213 is a wasteful number, since it uses less digits than its factorization.

210023121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68866 (or 68860 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 210023121213 its reverse (312121320012), we get a palindrome (522144441225).

The spelling of 210023121213 in words is "two hundred ten billion, twenty-three million, one hundred twenty-one thousand, two hundred thirteen".