213122113011 has 16 divisors (see below), whose sum is σ = 334309197600. Its totient is φ = 133723678464.

The previous prime is 213122113007. The next prime is 213122113013. The reversal of 213122113011 is 110311221312.

It is not a de Polignac number, because 213122113011 - 2² = 213122113007 is a prime.

It is a super-2 number, since 2×213122113011² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213122113013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232158706 + ... + 232159623.

It is an arithmetic number, because the mean of its divisors is an integer number (20894324850).

Almost surely, 2^213122113011 is an apocalyptic number.

213122113011 is a deficient number, since it is larger than the sum of its proper divisors (121187084589).

213122113011 is a wasteful number, since it uses less digits than its factorization.

213122113011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464318355 (or 464318349 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 213122113011 its reverse (110311221312), we get a palindrome (323433334323).

The spelling of 213122113011 in words is "two hundred thirteen billion, one hundred twenty-two million, one hundred thirteen thousand, eleven".