213023121213 has 24 divisors (see below), whose sum is σ = 330966209952. Its totient is φ = 121520076384.

The previous prime is 213023121209. The next prime is 213023121217. The reversal of 213023121213 is 312121320312.

It is an interprime number because it is at equal distance from previous prime (213023121209) and next prime (213023121217).

It is not a de Polignac number, because 213023121213 - 2² = 213023121209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 213023121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213023121217) 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, 1148070 + ... + 1320647.

It is an arithmetic number, because the mean of its divisors is an integer number (13790258748).

Almost surely, 2^213023121213 is an apocalyptic number.

It is an amenable number.

213023121213 is a deficient number, since it is larger than the sum of its proper divisors (117943088739).

213023121213 is a wasteful number, since it uses less digits than its factorization.

213023121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469321 (or 2469314 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213023121213 its reverse (312121320312), we get a palindrome (525144441525).

The spelling of 213023121213 in words is "two hundred thirteen billion, twenty-three million, one hundred twenty-one thousand, two hundred thirteen".