222121221121002 has 64 divisors (see below), whose sum is σ = 516340171607040. Its totient is φ = 62384012881536.

The previous prime is 222121221121001. The next prime is 222121221121103. The reversal of 222121221121002 is 200121122121222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 222121221121002.

It is not an unprimeable number, because it can be changed into a prime (222121221121001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41215753 + ... + 46292339.

It is an arithmetic number, because the mean of its divisors is an integer number (8067815181360).

Almost surely, 2^{222121221121002} is an apocalyptic number.

222121221121002 is an abundant number, since it is smaller than the sum of its proper divisors (294218950486038).

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

222121221121002 is a wasteful number, since it uses less digits than its factorization.

222121221121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5094315.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222121221121002 its reverse (200121122121222), we get a palindrome (422242343242224).

The spelling of 222121221121002 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two".