21211230031010 has 16 divisors (see below), whose sum is σ = 38180786468472. Its totient is φ = 8484364809600.

The previous prime is 21211230031001. The next prime is 21211230031027. The reversal of 21211230031010 is 1013003211212.

It can be written as a sum of positive squares in 4 ways, for example, as 17791515564001 + 3419714467009 = 4217999^2 + 1849247^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21211230031010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15198521 + ... + 16535340.

Almost surely, 2^{21211230031010} is an apocalyptic number.

21211230031010 is a deficient number, since it is larger than the sum of its proper divisors (16969556437462).

21211230031010 is a wasteful number, since it uses less digits than its factorization.

21211230031010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31800709.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21211230031010 its reverse (1013003211212), we get a palindrome (22224233242222).

The spelling of 21211230031010 in words is "twenty-one trillion, two hundred eleven billion, two hundred thirty million, thirty-one thousand, ten".