22145221024 has 12 divisors (see below), whose sum is σ = 43598403954. Its totient is φ = 11072610496.

The previous prime is 22145221009. The next prime is 22145221051. The reversal of 22145221024 is 42012254122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17113872400 + 5031348624 = 130820^2 + 70932^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22145221024.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346019047 + ... + 346019110.

Almost surely, 2^22145221024 is an apocalyptic number.

It is an amenable number.

22145221024 is a deficient number, since it is larger than the sum of its proper divisors (21453182930).

22145221024 is an equidigital number, since it uses as much as digits as its factorization.

22145221024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692038167 (or 692038159 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 22145221024 its reverse (42012254122), we get a palindrome (64157475146).

The spelling of 22145221024 in words is "twenty-two billion, one hundred forty-five million, two hundred twenty-one thousand, twenty-four".