21112020022001 has 4 divisors (see below), whose sum is σ = 21241541617392. Its totient is φ = 20982498426612.

The previous prime is 21112020021947. The next prime is 21112020022033. The reversal of 21112020022001 is 10022002021112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21112020022001 - 2²⁶ = 21111952913137 is a prime.

It is a super-2 number, since 2×21112020022001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112020022091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64760797451 + ... + 64760797776.

It is an arithmetic number, because the mean of its divisors is an integer number (5310385404348).

Almost surely, 2^{21112020022001} is an apocalyptic number.

It is an amenable number.

21112020022001 is a deficient number, since it is larger than the sum of its proper divisors (129521595391).

21112020022001 is a wasteful number, since it uses less digits than its factorization.

21112020022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129521595390.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21112020022001 its reverse (10022002021112), we get a palindrome (31134022043113).

The spelling of 21112020022001 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twenty-two thousand, one".