21210311123313 has 16 divisors (see below), whose sum is σ = 31438277531136. Its totient is φ = 12631450792320.

The previous prime is 21210311123249. The next prime is 21210311123321. The reversal of 21210311123313 is 31332111301212.

It is not a de Polignac number, because 21210311123313 - 2⁶ = 21210311123249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210311124313) 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, 8771839620 + ... + 8771842037.

It is an arithmetic number, because the mean of its divisors is an integer number (1964892345696).

Almost surely, 2^{21210311123313} is an apocalyptic number.

It is an amenable number.

21210311123313 is a deficient number, since it is larger than the sum of its proper divisors (10227966407823).

21210311123313 is a wasteful number, since it uses less digits than its factorization.

21210311123313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17543681704.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21210311123313 its reverse (31332111301212), we get a palindrome (52542422424525).

The spelling of 21210311123313 in words is "twenty-one trillion, two hundred ten billion, three hundred eleven million, one hundred twenty-three thousand, three hundred thirteen".