21522222222512 has 20 divisors (see below), whose sum is σ = 45490151516136. Its totient is φ = 9782828282880.

The previous prime is 21522222222451. The next prime is 21522222222563.

21522222222512 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61142676593 + ... + 61142676944.

Almost surely, 2^{21522222222512} is an apocalyptic number.

21522222222512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21522222222512 is an abundant number, since it is smaller than the sum of its proper divisors (23967929293624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21522222222512 is a wasteful number, since it uses less digits than its factorization.

21522222222512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122285353556 (or 122285353550 counting only the distinct ones).

The product of its digits is 25600, while the sum is 32.

It can be divided in two parts, 2152222 and 2222512, that added together give a palindrome (4374734).

The spelling of 21522222222512 in words is "twenty-one trillion, five hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, five hundred twelve".