21200211222102 has 160 divisors (see below), whose sum is σ = 51981176991744. Its totient is φ = 6404690952000.

The previous prime is 21200211222059. The next prime is 21200211222133. The reversal of 21200211222102 is 20122211200212.

It is a happy number.

21200211222102 is a `hidden beast` number, since 21 + 200 + 211 + 22 + 210 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 957844228 + ... + 957866360.

Almost surely, 2^{21200211222102} is an apocalyptic number.

21200211222102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21200211222102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25990588495872).

21200211222102 is an abundant number, since it is smaller than the sum of its proper divisors (30780965769642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21200211222102 is a wasteful number, since it uses less digits than its factorization.

21200211222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23776 (or 23767 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21200211222102 its reverse (20122211200212), we get a palindrome (41322422422314).

The spelling of 21200211222102 in words is "twenty-one trillion, two hundred billion, two hundred eleven million, two hundred twenty-two thousand, one hundred two".