213122031201311 has 4 divisors (see below), whose sum is σ = 213122415519000. Its totient is φ = 213121646883624.

The previous prime is 213122031201281. The next prime is 213122031201337. The reversal of 213122031201311 is 113102130221312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213122031201311 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 (213122031201011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191325821 + ... + 192436518.

It is an arithmetic number, because the mean of its divisors is an integer number (53280603879750).

Almost surely, 2^{213122031201311} is an apocalyptic number.

213122031201311 is a deficient number, since it is larger than the sum of its proper divisors (384317689).

213122031201311 is an equidigital number, since it uses as much as digits as its factorization.

213122031201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384317688.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 213122031201311 its reverse (113102130221312), we get a palindrome (326224161422623).

The spelling of 213122031201311 in words is "two hundred thirteen trillion, one hundred twenty-two billion, thirty-one million, two hundred one thousand, three hundred eleven".