21212000201022 has 16 divisors (see below), whose sum is σ = 42426236649360. Its totient is φ = 7070294025792.

The previous prime is 21212000201003. The next prime is 21212000201069. The reversal of 21212000201022 is 22010200021212.

It is a junction number, because it is equal to n+sod(n) for n = 21212000200992 and 21212000201010.

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, 93053647 + ... + 93281322.

It is an arithmetic number, because the mean of its divisors is an integer number (2651639790585).

Almost surely, 2^{21212000201022} is an apocalyptic number.

21212000201022 is an abundant number, since it is smaller than the sum of its proper divisors (21214236448338).

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

21212000201022 is a wasteful number, since it uses less digits than its factorization.

21212000201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186353947.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21212000201022 its reverse (22010200021212), we get a palindrome (43222200222234).

The spelling of 21212000201022 in words is "twenty-one trillion, two hundred twelve billion, two hundred one thousand, twenty-two".