21012102223211 has 16 divisors (see below), whose sum is σ = 23258967360000. Its totient is φ = 18822318559200.

The previous prime is 21012102223199. The next prime is 21012102223223. The reversal of 21012102223211 is 11232220121012.

It is an interprime number because it is at equal distance from previous prime (21012102223199) and next prime (21012102223223).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21012102223211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012102223111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23794460 + ... + 24661721.

It is an arithmetic number, because the mean of its divisors is an integer number (1453685460000).

Almost surely, 2^{21012102223211} is an apocalyptic number.

21012102223211 is a deficient number, since it is larger than the sum of its proper divisors (2246865136789).

21012102223211 is a wasteful number, since it uses less digits than its factorization.

21012102223211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48456770.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21012102223211 its reverse (11232220121012), we get a palindrome (32244322344223).

The spelling of 21012102223211 in words is "twenty-one trillion, twelve billion, one hundred two million, two hundred twenty-three thousand, two hundred eleven".