22121222022 has 12 divisors (see below), whose sum is σ = 47929314420. Its totient is φ = 7373740668.

The previous prime is 22121221981. The next prime is 22121222027. The reversal of 22121222022 is 22022212122.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1228956779 = 22121222022 / (2 + 2 + 1 + 2 + 1 + 2 + 2 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 22121221986 and 22121222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121222027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614478372 + ... + 614478407.

It is an arithmetic number, because the mean of its divisors is an integer number (3994109535).

Almost surely, 2^22121222022 is an apocalyptic number.

22121222022 is an abundant number, since it is smaller than the sum of its proper divisors (25808092398).

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

22121222022 is a wasteful number, since it uses less digits than its factorization.

22121222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228956787 (or 1228956784 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22121222022 its reverse (22022212122), we get a palindrome (44143434144).

It can be divided in two parts, 2212122 and 2022, that added together give a square (2214144 = 1488²).

The spelling of 22121222022 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-two".