21112020102021 has 8 divisors (see below), whose sum is σ = 29805204849984. Its totient is φ = 13246757711040.

The previous prime is 21112020101951. The next prime is 21112020102023. The reversal of 21112020102021 is 12020102021112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21112020102021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112020102023) 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 7 ways as a sum of consecutive naturals, for example, 206980589185 + ... + 206980589286.

It is an arithmetic number, because the mean of its divisors is an integer number (3725650606248).

Almost surely, 2^{21112020102021} is an apocalyptic number.

It is an amenable number.

21112020102021 is a deficient number, since it is larger than the sum of its proper divisors (8693184747963).

21112020102021 is a wasteful number, since it uses less digits than its factorization.

21112020102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413961178491.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112020102021 its reverse (12020102021112), we get a palindrome (33132122123133).

The spelling of 21112020102021 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred two thousand, twenty-one".