21121122012313 has 4 divisors (see below), whose sum is σ = 21181989799440. Its totient is φ = 21060254225188.

The previous prime is 21121122012299. The next prime is 21121122012433. The reversal of 21121122012313 is 31321022112112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21121122012313 - 2¹³ = 21121122004121 is a prime.

It is a super-2 number, since 2×21121122012313² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121222012313) 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, 30433893043 + ... + 30433893736.

It is an arithmetic number, because the mean of its divisors is an integer number (5295497449860).

Almost surely, 2^{21121122012313} is an apocalyptic number.

It is an amenable number.

21121122012313 is a deficient number, since it is larger than the sum of its proper divisors (60867787127).

21121122012313 is an equidigital number, since it uses as much as digits as its factorization.

21121122012313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60867787126.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21121122012313 its reverse (31321022112112), we get a palindrome (52442144124425).

The spelling of 21121122012313 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty-two million, twelve thousand, three hundred thirteen".