22122211002221 has 24 divisors (see below), whose sum is σ = 24659628662592. Its totient is φ = 19827043174400.

The previous prime is 22122211002193. The next prime is 22122211002257. The reversal of 22122211002221 is 12220011222122.

It is a de Polignac number, because none of the positive numbers 2^k-22122211002221 is a prime.

It is a super-2 number, since 2×22122211002221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22122211002193 and 22122211002202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122213002221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345266030 + ... + 345330096.

It is an arithmetic number, because the mean of its divisors is an integer number (1027484527608).

Almost surely, 2^{22122211002221} is an apocalyptic number.

It is an amenable number.

22122211002221 is a deficient number, since it is larger than the sum of its proper divisors (2537417660371).

22122211002221 is a wasteful number, since it uses less digits than its factorization.

22122211002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104353 (or 104342 counting only the distinct ones).

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

Adding to 22122211002221 its reverse (12220011222122), we get a palindrome (34342222224343).

The spelling of 22122211002221 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred eleven million, two thousand, two hundred twenty-one".