21213030113210 has 16 divisors (see below), whose sum is σ = 41120642988936. Its totient is φ = 7832503426368.

The previous prime is 21213030113161. The next prime is 21213030113227. The reversal of 21213030113210 is 1231103031212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15165331044361 + 6047699068849 = 3894269^2 + 2459207^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81588577229 + ... + 81588577488.

Almost surely, 2^{21213030113210} is an apocalyptic number.

21213030113210 is a deficient number, since it is larger than the sum of its proper divisors (19907612875726).

21213030113210 is a wasteful number, since it uses less digits than its factorization.

21213030113210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163177154737.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21213030113210 its reverse (1231103031212), we get a palindrome (22444133144422).

The spelling of 21213030113210 in words is "twenty-one trillion, two hundred thirteen billion, thirty million, one hundred thirteen thousand, two hundred ten".