21211222201022 has 16 divisors (see below), whose sum is σ = 36366924987360. Its totient is φ = 9089316354048.

The previous prime is 21211222200989. The next prime is 21211222201181. The reversal of 21211222201022 is 22010222211212.

It is a super-2 number, since 2×21211222201022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211222200985 and 21211222201003.

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, 100511363 + ... + 100722174.

It is an arithmetic number, because the mean of its divisors is an integer number (2272932811710).

Almost surely, 2^{21211222201022} is an apocalyptic number.

21211222201022 is a deficient number, since it is larger than the sum of its proper divisors (15155702786338).

21211222201022 is a wasteful number, since it uses less digits than its factorization.

21211222201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201241075.

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

Adding to 21211222201022 its reverse (22010222211212), we get a palindrome (43221444412234).

The spelling of 21211222201022 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred one thousand, twenty-two".