21402213110 has 16 divisors (see below), whose sum is σ = 39011630400. Its totient is φ = 8452519296.

The previous prime is 21402213089. The next prime is 21402213113. The reversal of 21402213110 is 1131220412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402213113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13544915 + ... + 13546494.

It is an arithmetic number, because the mean of its divisors is an integer number (2438226900).

Almost surely, 2^21402213110 is an apocalyptic number.

21402213110 is a deficient number, since it is larger than the sum of its proper divisors (17609417290).

21402213110 is a wasteful number, since it uses less digits than its factorization.

21402213110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27091495.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21402213110 its reverse (1131220412), we get a palindrome (22533433522).

The spelling of 21402213110 in words is "twenty-one billion, four hundred two million, two hundred thirteen thousand, one hundred ten".