21021113231113 has 8 divisors (see below), whose sum is σ = 21935241926208. Its totient is φ = 20106998473584.

The previous prime is 21021113231081. The next prime is 21021113231119. The reversal of 21021113231113 is 31113231112012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021113231113 - 2⁵ = 21021113231081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021113231119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342031 + ... + 6493012.

It is an arithmetic number, because the mean of its divisors is an integer number (2741905240776).

Almost surely, 2^{21021113231113} is an apocalyptic number.

21021113231113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21021113231113 is a deficient number, since it is larger than the sum of its proper divisors (914128695095).

21021113231113 is a wasteful number, since it uses less digits than its factorization.

21021113231113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6968783.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21021113231113 its reverse (31113231112012), we get a palindrome (52134344343125).

The spelling of 21021113231113 in words is "twenty-one trillion, twenty-one billion, one hundred thirteen million, two hundred thirty-one thousand, one hundred thirteen".