22234856721 has 32 divisors (see below), whose sum is σ = 37149539328. Its totient is φ = 11491919040.

The previous prime is 22234856629. The next prime is 22234856729. The reversal of 22234856721 is 12765843222.

It is not a de Polignac number, because 22234856721 - 2¹⁴ = 22234840337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22234856729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198795 + ... + 289808.

It is an arithmetic number, because the mean of its divisors is an integer number (1160923104).

Almost surely, 2^22234856721 is an apocalyptic number.

22234856721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22234856721 is a deficient number, since it is larger than the sum of its proper divisors (14914682607).

22234856721 is a wasteful number, since it uses less digits than its factorization.

22234856721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488821.

The product of its digits is 322560, while the sum is 42.

The spelling of 22234856721 in words is "twenty-two billion, two hundred thirty-four million, eight hundred fifty-six thousand, seven hundred twenty-one".