20220221121021 has 24 divisors (see below), whose sum is σ = 29758350978720. Its totient is φ = 13225676252256.

The previous prime is 20220221120993. The next prime is 20220221121091. The reversal of 20220221121021 is 12012112202202.

It is a happy number.

20220221121021 is a `hidden beast` number, since 2 + 0 + 220 + 2 + 211 + 210 + 21 = 666.

It is not a de Polignac number, because 20220221121021 - 2¹³ = 20220221112829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20220221120985 and 20220221121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220221121091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91792150 + ... + 92012168.

It is an arithmetic number, because the mean of its divisors is an integer number (1239931290780).

Almost surely, 2^{20220221121021} is an apocalyptic number.

It is an amenable number.

20220221121021 is a deficient number, since it is larger than the sum of its proper divisors (9538129857699).

20220221121021 is a wasteful number, since it uses less digits than its factorization.

20220221121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412745 (or 412742 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20220221121021 its reverse (12012112202202), we get a palindrome (32232333323223).

The spelling of 20220221121021 in words is "twenty trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-one".