222201222012 has 144 divisors (see below), whose sum is σ = 701806839552. Its totient is φ = 57587984640.

The previous prime is 222201221969. The next prime is 222201222017. The reversal of 222201222012 is 210222102222.

It is a super-2 number, since 2×222201222012² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222201222017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1179103 + ... + 1354505.

It is an arithmetic number, because the mean of its divisors is an integer number (4873658608).

Almost surely, 2^222201222012 is an apocalyptic number.

222201222012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222201222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350903419776).

222201222012 is an abundant number, since it is smaller than the sum of its proper divisors (479605617540).

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

222201222012 is a wasteful number, since it uses less digits than its factorization.

222201222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175888 (or 175883 counting only the distinct ones).

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

Adding to 222201222012 its reverse (210222102222), we get a palindrome (432423324234).

The spelling of 222201222012 in words is "two hundred twenty-two billion, two hundred one million, two hundred twenty-two thousand, twelve".