21210311111313 has 16 divisors (see below), whose sum is σ = 29944132142400. Its totient is φ = 13308357828096.

The previous prime is 21210311111293. The next prime is 21210311111317. The reversal of 21210311111313 is 31311111301212.

It is not a de Polignac number, because 21210311111313 - 2²⁹ = 21209774240401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21210311111313.

It is not an unprimeable number, because it can be changed into a prime (21210311111317) 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, 9210781 + ... + 11280917.

It is an arithmetic number, because the mean of its divisors is an integer number (1871508258900).

Almost surely, 2^{21210311111313} is an apocalyptic number.

It is an amenable number.

21210311111313 is a deficient number, since it is larger than the sum of its proper divisors (8733821031087).

21210311111313 is a wasteful number, since it uses less digits than its factorization.

21210311111313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271056.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 21210311111313 its reverse (31311111301212), we get a palindrome (52521422412525).

The spelling of 21210311111313 in words is "twenty-one trillion, two hundred ten billion, three hundred eleven million, one hundred eleven thousand, three hundred thirteen".