20122111331021 has 16 divisors (see below), whose sum is σ = 23096285941248. Its totient is φ = 17172839241600.

The previous prime is 20122111331017. The next prime is 20122111331051. The reversal of 20122111331021 is 12013311122102.

It is not a de Polignac number, because 20122111331021 - 2² = 20122111331017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122111330984 and 20122111331002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122111331051) 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, 44760956 + ... + 45208266.

It is an arithmetic number, because the mean of its divisors is an integer number (1443517871328).

Almost surely, 2^{20122111331021} is an apocalyptic number.

It is an amenable number.

20122111331021 is a deficient number, since it is larger than the sum of its proper divisors (2974174610227).

20122111331021 is a wasteful number, since it uses less digits than its factorization.

20122111331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475132.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20122111331021 its reverse (12013311122102), we get a palindrome (32135422453123).

The spelling of 20122111331021 in words is "twenty trillion, one hundred twenty-two billion, one hundred eleven million, three hundred thirty-one thousand, twenty-one".