21142212204 has 48 divisors (see below), whose sum is σ = 49785926400. Its totient is φ = 6982787136.

The previous prime is 21142212107. The next prime is 21142212211. The reversal of 21142212204 is 40221224112.

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 15 ways as a sum of consecutive naturals, for example, 660727 + ... + 691985.

It is an arithmetic number, because the mean of its divisors is an integer number (1037206800).

Almost surely, 2^21142212204 is an apocalyptic number.

It is an amenable number.

21142212204 is an abundant number, since it is smaller than the sum of its proper divisors (28643714196).

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

21142212204 is a wasteful number, since it uses less digits than its factorization.

21142212204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31782 (or 31780 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21142212204 its reverse (40221224112), we get a palindrome (61363436316).

The spelling of 21142212204 in words is "twenty-one billion, one hundred forty-two million, two hundred twelve thousand, two hundred four".