20221120102021 has 4 divisors (see below), whose sum is σ = 20421329212044. Its totient is φ = 20020910992000.

The previous prime is 20221120102019. The next prime is 20221120102063. The reversal of 20221120102021 is 12020102112202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12563558229121 + 7657561872900 = 3544511^2 + 2767230^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221120102021 - 2¹ = 20221120102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20221120101986 and 20221120102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221120112021) 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, 100104554860 + ... + 100104555061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105332303011).

Almost surely, 2^{20221120102021} is an apocalyptic number.

It is an amenable number.

20221120102021 is a deficient number, since it is larger than the sum of its proper divisors (200209110023).

20221120102021 is a wasteful number, since it uses less digits than its factorization.

20221120102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200209110022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20221120102021 its reverse (12020102112202), we get a palindrome (32241222214223).

The spelling of 20221120102021 in words is "twenty trillion, two hundred twenty-one billion, one hundred twenty million, one hundred two thousand, twenty-one".