20021020101121 has 16 divisors (see below), whose sum is σ = 22708425983040. Its totient is φ = 17498592371520.

The previous prime is 20021020101053. The next prime is 20021020101149. The reversal of 20021020101121 is 12110102012002.

It is not a de Polignac number, because 20021020101121 - 2²¹ = 20021018003969 is a prime.

It is a super-2 number, since 2×20021020101121² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021020101151) 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, 21931690 + ... + 22826323.

It is an arithmetic number, because the mean of its divisors is an integer number (1419276623940).

Almost surely, 2^{20021020101121} is an apocalyptic number.

It is an amenable number.

20021020101121 is a deficient number, since it is larger than the sum of its proper divisors (2687405881919).

20021020101121 is a wasteful number, since it uses less digits than its factorization.

20021020101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44759856.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021020101121 its reverse (12110102012002), we get a palindrome (32131122113123).

The spelling of 20021020101121 in words is "twenty trillion, twenty-one billion, twenty million, one hundred one thousand, one hundred twenty-one".