21112020020001 has 16 divisors (see below), whose sum is σ = 29766121072128. Its totient is φ = 13288446902400.

The previous prime is 21112020019991. The next prime is 21112020020041. The reversal of 21112020020001 is 10002002021112.

It is not a de Polignac number, because 21112020020001 - 2⁷ = 21112020019873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112020020041) 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, 2768422626 + ... + 2768430251.

It is an arithmetic number, because the mean of its divisors is an integer number (1860382567008).

Almost surely, 2^{21112020020001} is an apocalyptic number.

It is an amenable number.

21112020020001 is a deficient number, since it is larger than the sum of its proper divisors (8654101052127).

21112020020001 is a wasteful number, since it uses less digits than its factorization.

21112020020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536852952.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21112020020001 its reverse (10002002021112), we get a palindrome (31114022041113).

The spelling of 21112020020001 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twenty thousand, one".