22221202021002 has 24 divisors (see below), whose sum is σ = 48146543698500. Its totient is φ = 7406974111680.

The previous prime is 22221202020991. The next prime is 22221202021013. The reversal of 22221202021002 is 20012020212222.

22221202021002 is a `hidden beast` number, since 222 + 212 + 0 + 20 + 210 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (22221202020991) and next prime (22221202021013).

It can be written as a sum of positive squares in 2 ways, for example, as 15812957855601 + 6408244165401 = 3976551^2 + 2531451^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6291627 + ... + 9166622.

Almost surely, 2^{22221202021002} is an apocalyptic number.

22221202021002 is an abundant number, since it is smaller than the sum of its proper divisors (25925341677498).

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

22221202021002 is a wasteful number, since it uses less digits than its factorization.

22221202021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15538118 (or 15538115 counting only the distinct ones).

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

Adding to 22221202021002 its reverse (20012020212222), we get a palindrome (42233222233224).

The spelling of 22221202021002 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred two million, twenty-one thousand, two".