21210212110113 has 96 divisors (see below), whose sum is σ = 36066511982592. Its totient is φ = 11890043136000.

The previous prime is 21210212110111. The next prime is 21210212110117. The reversal of 21210212110113 is 31101121201212.

It is a happy number.

21210212110113 is a `hidden beast` number, since 21 + 210 + 212 + 110 + 113 = 666.

It is not a de Polignac number, because 21210212110113 - 2¹ = 21210212110111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210212110111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13301788 + ... + 14810738.

It is an arithmetic number, because the mean of its divisors is an integer number (375692833152).

Almost surely, 2^{21210212110113} is an apocalyptic number.

It is an amenable number.

21210212110113 is a deficient number, since it is larger than the sum of its proper divisors (14856299872479).

21210212110113 is a wasteful number, since it uses less digits than its factorization.

21210212110113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509215 (or 1509212 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21210212110113 its reverse (31101121201212), we get a palindrome (52311333311325).

The spelling of 21210212110113 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve million, one hundred ten thousand, one hundred thirteen".