21142224132 has 36 divisors (see below), whose sum is σ = 50403865680. Its totient is φ = 6897454544.

The previous prime is 21142224127. The next prime is 21142224137. The reversal of 21142224132 is 23142224112.

It is an interprime number because it is at equal distance from previous prime (21142224127) and next prime (21142224137).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21142224137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 372282 + ... + 425297.

It is an arithmetic number, because the mean of its divisors is an integer number (1400107380).

Almost surely, 2^21142224132 is an apocalyptic number.

It is an amenable number.

21142224132 is an abundant number, since it is smaller than the sum of its proper divisors (29261641548).

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

21142224132 is a wasteful number, since it uses less digits than its factorization.

21142224132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797680 (or 797631 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

Adding to 21142224132 its reverse (23142224112), we get a palindrome (44284448244).

The spelling of 21142224132 in words is "twenty-one billion, one hundred forty-two million, two hundred twenty-four thousand, one hundred thirty-two".