222221202012 has 36 divisors (see below), whose sum is σ = 562464027216. Its totient is φ = 73976387520.

The previous prime is 222221201999. The next prime is 222221202017. The reversal of 222221202012 is 210202122222.

222221202012 is a `hidden beast` number, since 222 + 221 + 20 + 201 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×222221202012² (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 (222221202017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4028328 + ... + 4083119.

It is an arithmetic number, because the mean of its divisors is an integer number (15624000756).

Almost surely, 2^222221202012 is an apocalyptic number.

It is an amenable number.

222221202012 is an abundant number, since it is smaller than the sum of its proper divisors (340242825204).

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

222221202012 is a wasteful number, since it uses less digits than its factorization.

222221202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8112218 (or 8112213 counting only the distinct ones).

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

Adding to 222221202012 its reverse (210202122222), we get a palindrome (432423324234).

The spelling of 222221202012 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred two thousand, twelve".