20122211002221 has 24 divisors (see below), whose sum is σ = 31925399613120. Its totient is φ = 12156209847936.

The previous prime is 20122211002219. The next prime is 20122211002247. The reversal of 20122211002221 is 12220011222102.

It is a happy number.

It is not a de Polignac number, because 20122211002221 - 2¹ = 20122211002219 is a prime.

It is a super-2 number, since 2×20122211002221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20122211002194 and 20122211002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122211002921) 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, 2558121036 + ... + 2558128901.

It is an arithmetic number, because the mean of its divisors is an integer number (1330224983880).

Almost surely, 2^{20122211002221} is an apocalyptic number.

It is an amenable number.

20122211002221 is a deficient number, since it is larger than the sum of its proper divisors (11803188610899).

20122211002221 is a wasteful number, since it uses less digits than its factorization.

20122211002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116249985 (or 5116249982 counting only the distinct ones).

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

Adding to 20122211002221 its reverse (12220011222102), we get a palindrome (32342222224323).

The spelling of 20122211002221 in words is "twenty trillion, one hundred twenty-two billion, two hundred eleven million, two thousand, two hundred twenty-one".