21211220200102 has 16 divisors (see below), whose sum is σ = 31822517160720. Its totient is φ = 10603714671648.

The previous prime is 21211220200067. The next prime is 21211220200147. The reversal of 21211220200102 is 20100202211212.

It is a happy number.

It is a congruent number.

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, 296886328 + ... + 296957764.

It is an arithmetic number, because the mean of its divisors is an integer number (1988907322545).

Almost surely, 2^{21211220200102} is an apocalyptic number.

21211220200102 is a deficient number, since it is larger than the sum of its proper divisors (10611296960618).

21211220200102 is a wasteful number, since it uses less digits than its factorization.

21211220200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95895.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211220200102 its reverse (20100202211212), we get a palindrome (41311422411314).

The spelling of 21211220200102 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty million, two hundred thousand, one hundred two".