2122221005656 has 16 divisors (see below), whose sum is σ = 3979433089440. Its totient is φ = 1061038848480.

The previous prime is 2122221005623. The next prime is 2122221005669. The reversal of 2122221005656 is 6565001222212.

It is a super-3 number, since 3×2122221005656³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8830816 + ... + 9067951.

It is an arithmetic number, because the mean of its divisors is an integer number (248714568090).

Almost surely, 2^{2122221005656} is an apocalyptic number.

It is an amenable number.

2122221005656 is a deficient number, since it is larger than the sum of its proper divisors (1857212083784).

2122221005656 is a wasteful number, since it uses less digits than its factorization.

2122221005656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17913594 (or 17913590 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 2122221005656 its reverse (6565001222212), we get a palindrome (8687222227868).

The spelling of 2122221005656 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, five thousand, six hundred fifty-six".