21142223210 has 64 divisors (see below), whose sum is σ = 40468222080. Its totient is φ = 7930379520.

The previous prime is 21142223131. The next prime is 21142223261. The reversal of 21142223210 is 1232224112.

It is a super-2 number, since 2×21142223210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7896392 + ... + 7899068.

It is an arithmetic number, because the mean of its divisors is an integer number (632315970).

Almost surely, 2^21142223210 is an apocalyptic number.

21142223210 is a deficient number, since it is larger than the sum of its proper divisors (19325998870).

21142223210 is a wasteful number, since it uses less digits than its factorization.

21142223210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21142223210 its reverse (1232224112), we get a palindrome (22374447322).

The spelling of 21142223210 in words is "twenty-one billion, one hundred forty-two million, two hundred twenty-three thousand, two hundred ten".