21222224321125 has 32 divisors (see below), whose sum is σ = 26706483872640. Its totient is φ = 16836202240000.

The previous prime is 21222224321117. The next prime is 21222224321131. The reversal of 21222224321125 is 52112342222212.

It is not a de Polignac number, because 21222224321125 - 2³ = 21222224321117 is a prime.

It is a super-2 number, since 2×21222224321125² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22612470 + ... + 23532280.

It is an arithmetic number, because the mean of its divisors is an integer number (834577621020).

Almost surely, 2^{21222224321125} is an apocalyptic number.

21222224321125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21222224321125 is a deficient number, since it is larger than the sum of its proper divisors (5484259551515).

21222224321125 is a wasteful number, since it uses less digits than its factorization.

21222224321125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921366 (or 921356 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

Adding to 21222224321125 its reverse (52112342222212), we get a palindrome (73334566543337).

The spelling of 21222224321125 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-four million, three hundred twenty-one thousand, one hundred twenty-five".