21142012210 has 64 divisors (see below), whose sum is σ = 42421708800. Its totient is φ = 7521393600.

The previous prime is 21142012201. The next prime is 21142012219. The reversal of 21142012210 is 1221024112.

It is an interprime number because it is at equal distance from previous prime (21142012201) and next prime (21142012219).

It is not an unprimeable number, because it can be changed into a prime (21142012219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1361671 + ... + 1377109.

It is an arithmetic number, because the mean of its divisors is an integer number (662839200).

Almost surely, 2^21142012210 is an apocalyptic number.

21142012210 is an abundant number, since it is smaller than the sum of its proper divisors (21279696590).

21142012210 is a wasteful number, since it uses less digits than its factorization.

21142012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15727.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21142012210 its reverse (1221024112), we get a palindrome (22363036322).

The spelling of 21142012210 in words is "twenty-one billion, one hundred forty-two million, twelve thousand, two hundred ten".