21120212102202 has 192 divisors, whose sum is σ = 48621930140160. Its totient is φ = 6615469324800.

The previous prime is 21120212102149. The next prime is 21120212102233. The reversal of 21120212102202 is 20220121202112.

It is a happy number.

21120212102202 is a `hidden beast` number, since 211 + 2 + 0 + 21 + 210 + 220 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6005176548 + ... + 6005180064.

It is an arithmetic number, because the mean of its divisors is an integer number (253239219480).

Almost surely, 2^{21120212102202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21120212102202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24310965070080).

21120212102202 is an abundant number, since it is smaller than the sum of its proper divisors (27501718037958).

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

21120212102202 is a wasteful number, since it uses less digits than its factorization.

21120212102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549 (or 5546 counting only the distinct ones).

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

Adding to 21120212102202 its reverse (20220121202112), we get a palindrome (41340333304314).

The spelling of 21120212102202 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, one hundred two thousand, two hundred two".