213023121131 has 8 divisors (see below), whose sum is σ = 215951137584. Its totient is φ = 210095372160.

The previous prime is 213023121107. The next prime is 213023121187. The reversal of 213023121131 is 131121320312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213023121131 is a prime.

It is a super-2 number, since 2×213023121131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213023120131) 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, 1953020 + ... + 2059206.

It is an arithmetic number, because the mean of its divisors is an integer number (26993892198).

Almost surely, 2^213023121131 is an apocalyptic number.

213023121131 is a deficient number, since it is larger than the sum of its proper divisors (2928016453).

213023121131 is a wasteful number, since it uses less digits than its factorization.

213023121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133741.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213023121131 its reverse (131121320312), we get a palindrome (344144441443).

The spelling of 213023121131 in words is "two hundred thirteen billion, twenty-three million, one hundred twenty-one thousand, one hundred thirty-one".