20221111002121 has 16 divisors (see below), whose sum is σ = 20525918814720. Its totient is φ = 19917072823680.

The previous prime is 20221111002047. The next prime is 20221111002133. The reversal of 20221111002121 is 12120011112202.

It is a cyclic number.

It is not a de Polignac number, because 20221111002121 - 2¹¹ = 20221111000073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221111002095 and 20221111002104.

It is not an unprimeable number, because it can be changed into a prime (20221111002181) 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, 164684811 + ... + 164807551.

It is an arithmetic number, because the mean of its divisors is an integer number (1282869925920).

Almost surely, 2^{20221111002121} is an apocalyptic number.

It is an amenable number.

20221111002121 is a deficient number, since it is larger than the sum of its proper divisors (304807812599).

20221111002121 is a wasteful number, since it uses less digits than its factorization.

20221111002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125856.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20221111002121 its reverse (12120011112202), we get a palindrome (32341122114323).

The spelling of 20221111002121 in words is "twenty trillion, two hundred twenty-one billion, one hundred eleven million, two thousand, one hundred twenty-one".