22220220021021 has 24 divisors (see below), whose sum is σ = 35017543108704. Its totient is φ = 13465314214560.

The previous prime is 22220220021017. The next prime is 22220220021023. The reversal of 22220220021021 is 12012002202222.

22220220021021 is a `hidden beast` number, since 222 + 202 + 200 + 21 + 0 + 21 = 666.

It is not a de Polignac number, because 22220220021021 - 2² = 22220220021017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22220220020985 and 22220220021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220220021023) 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, 11479486 + ... + 13274751.

It is an arithmetic number, because the mean of its divisors is an integer number (1459064296196).

Almost surely, 2^{22220220021021} is an apocalyptic number.

It is an amenable number.

22220220021021 is a deficient number, since it is larger than the sum of its proper divisors (12797323087683).

22220220021021 is a wasteful number, since it uses less digits than its factorization.

22220220021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24763321 (or 24763318 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22220220021021 its reverse (12012002202222), we get a palindrome (34232222223243).

The spelling of 22220220021021 in words is "twenty-two trillion, two hundred twenty billion, two hundred twenty million, twenty-one thousand, twenty-one".