21222121201022 has 16 divisors (see below), whose sum is σ = 36598628183040. Its totient is φ = 9040732555128.

The previous prime is 21222121200989. The next prime is 21222121201049. The reversal of 21222121201022 is 22010212122212.

It is a junction number, because it is equal to n+sod(n) for n = 21222121200985 and 21222121201003.

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, 4538518022 + ... + 4538522697.

It is an arithmetic number, because the mean of its divisors is an integer number (2287414261440).

Almost surely, 2^{21222121201022} is an apocalyptic number.

21222121201022 is a deficient number, since it is larger than the sum of its proper divisors (15376506982018).

21222121201022 is a wasteful number, since it uses less digits than its factorization.

21222121201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077040895.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222121201022 its reverse (22010212122212), we get a palindrome (43232333323234).

The spelling of 21222121201022 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred one thousand, twenty-two".