213122000311 has 4 divisors (see below), whose sum is σ = 232496727624. Its totient is φ = 193747273000.

The previous prime is 213122000249. The next prime is 213122000359. The reversal of 213122000311 is 113000221312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213122000311 - 2¹⁷ = 213121869239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213122000911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9687363640 + ... + 9687363661.

It is an arithmetic number, because the mean of its divisors is an integer number (58124181906).

Almost surely, 2^213122000311 is an apocalyptic number.

213122000311 is a deficient number, since it is larger than the sum of its proper divisors (19374727313).

213122000311 is a wasteful number, since it uses less digits than its factorization.

213122000311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19374727312.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 213122000311 its reverse (113000221312), we get a palindrome (326122221623).

The spelling of 213122000311 in words is "two hundred thirteen billion, one hundred twenty-two million, three hundred eleven", and thus it is an aban number.