21012122102202 has 80 divisors (see below), whose sum is σ = 58700531621952. Its totient is φ = 5457694049280.

The previous prime is 21012122102197. The next prime is 21012122102219. The reversal of 21012122102202 is 20220122121012.

It is a happy number.

21012122102202 is a `hidden beast` number, since 21 + 0 + 1 + 212 + 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 39 ways as a sum of consecutive naturals, for example, 842224263 + ... + 842249210.

Almost surely, 2^{21012122102202} is an apocalyptic number.

21012122102202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012122102202 is an abundant number, since it is smaller than the sum of its proper divisors (37688409519750).

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

21012122102202 is a wasteful number, since it uses less digits than its factorization.

21012122102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684473505 (or 1684473496 counting only the distinct ones).

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

Adding to 21012122102202 its reverse (20220122121012), we get a palindrome (41232244223214).

The spelling of 21012122102202 in words is "twenty-one trillion, twelve billion, one hundred twenty-two million, one hundred two thousand, two hundred two".