21302100111021 has 64 divisors (see below), whose sum is σ = 30942570405888. Its totient is φ = 12981132223488.

The previous prime is 21302100111013. The next prime is 21302100111029. The reversal of 21302100111021 is 12011100120312.

It is an interprime number because it is at equal distance from previous prime (21302100111013) and next prime (21302100111029).

It is not a de Polignac number, because 21302100111021 - 2³ = 21302100111013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302100111029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2758263666 + ... + 2758271388.

It is an arithmetic number, because the mean of its divisors is an integer number (483477662592).

Almost surely, 2^{21302100111021} is an apocalyptic number.

It is an amenable number.

21302100111021 is a deficient number, since it is larger than the sum of its proper divisors (9640470294867).

21302100111021 is a wasteful number, since it uses less digits than its factorization.

21302100111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21302100111021 its reverse (12011100120312), we get a palindrome (33313200231333).

The spelling of 21302100111021 in words is "twenty-one trillion, three hundred two billion, one hundred million, one hundred eleven thousand, twenty-one".