22021042252 has 24 divisors (see below), whose sum is σ = 42044853312. Its totient is φ = 10008450000.

The previous prime is 22021042217. The next prime is 22021042289. The reversal of 22021042252 is 25224012022.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472803 + ... + 517285.

It is an arithmetic number, because the mean of its divisors is an integer number (1751868888).

Almost surely, 2^22021042252 is an apocalyptic number.

22021042252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22021042252 is a deficient number, since it is larger than the sum of its proper divisors (20023811060).

22021042252 is a wasteful number, since it uses less digits than its factorization.

22021042252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55749 (or 55747 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 22021042252 its reverse (25224012022), we get a palindrome (47245054274).

The spelling of 22021042252 in words is "twenty-two billion, twenty-one million, forty-two thousand, two hundred fifty-two".