21102101012113 has 16 divisors (see below), whose sum is σ = 23038567059456. Its totient is φ = 19168655225040.

The previous prime is 21102101012071. The next prime is 21102101012119. The reversal of 21102101012113 is 31121010120112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102101012113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102101012119) 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, 91800120 + ... + 92029702.

It is an arithmetic number, because the mean of its divisors is an integer number (1439910441216).

Almost surely, 2^{21102101012113} is an apocalyptic number.

It is an amenable number.

21102101012113 is a deficient number, since it is larger than the sum of its proper divisors (1936466047343).

21102101012113 is a wasteful number, since it uses less digits than its factorization.

21102101012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236124.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21102101012113 its reverse (31121010120112), we get a palindrome (52223111132225).

The spelling of 21102101012113 in words is "twenty-one trillion, one hundred two billion, one hundred one million, twelve thousand, one hundred thirteen".