221211212022 has 48 divisors (see below), whose sum is σ = 492333026640. Its totient is φ = 71731313856.

The previous prime is 221211212021. The next prime is 221211212077. The reversal of 221211212022 is 220212112122.

It is a happy number.

221211212022 is a `hidden beast` number, since 221 + 211 + 212 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221211211986 and 221211212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211212021) 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, 4121853 + ... + 4175175.

It is an arithmetic number, because the mean of its divisors is an integer number (10256938055).

Almost surely, 2^221211212022 is an apocalyptic number.

221211212022 is an abundant number, since it is smaller than the sum of its proper divisors (271121814618).

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

221211212022 is a wasteful number, since it uses less digits than its factorization.

221211212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59597 (or 59594 counting only the distinct ones).

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

Adding to 221211212022 its reverse (220212112122), we get a palindrome (441423324144).

The spelling of 221211212022 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred twelve thousand, twenty-two".