222221121012001 has 16 divisors (see below), whose sum is σ = 237431864217600. Its totient is φ = 207530922669840.

The previous prime is 222221121011951. The next prime is 222221121012029. The reversal of 222221121012001 is 100210121122222.

It is a cyclic number.

It is not a de Polignac number, because 222221121012001 - 2¹⁷ = 222221120880929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222221121012001.

It is not an unprimeable number, because it can be changed into a prime (222221121012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660421701 + ... + 660758098.

It is an arithmetic number, because the mean of its divisors is an integer number (14839491513600).

Almost surely, 2^{222221121012001} is an apocalyptic number.

It is an amenable number.

222221121012001 is a deficient number, since it is larger than the sum of its proper divisors (15210743205599).

222221121012001 is a wasteful number, since it uses less digits than its factorization.

222221121012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321179996.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 222221121012001 its reverse (100210121122222), we get a palindrome (322431242134223).

The spelling of 222221121012001 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, one".