20210221121022 has 16 divisors (see below), whose sum is σ = 44911602491280. Its totient is φ = 6736740373656.

The previous prime is 20210221121021. The next prime is 20210221121039. The reversal of 20210221121022 is 22012112201202.

It is a happy number.

20210221121022 is a `hidden beast` number, since 2 + 0 + 210 + 221 + 1 + 210 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20210221120986 and 20210221121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210221121021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187131676993 + ... + 187131677100.

It is an arithmetic number, because the mean of its divisors is an integer number (2806975155705).

Almost surely, 2^{20210221121022} is an apocalyptic number.

20210221121022 is an abundant number, since it is smaller than the sum of its proper divisors (24701381370258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20210221121022 is a wasteful number, since it uses less digits than its factorization.

20210221121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374263354104 (or 374263354098 counting only the distinct ones).

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

Adding to 20210221121022 its reverse (22012112201202), we get a palindrome (42222333322224).

The spelling of 20210221121022 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-two".