222121022012001 has 16 divisors (see below), whose sum is σ = 376077920867200. Its totient is φ = 126926298292464.

The previous prime is 222121022011909. The next prime is 222121022012033. The reversal of 222121022012001 is 100210220121222.

It is a happy number.

222121022012001 is a `hidden beast` number, since 2 + 221 + 21 + 0 + 220 + 1 + 200 + 1 = 666.

It is not a de Polignac number, because 222121022012001 - 2¹⁴ = 222121021995617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121022012101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587621751166 + ... + 587621751543.

It is an arithmetic number, because the mean of its divisors is an integer number (23504870054200).

Almost surely, 2^{222121022012001} is an apocalyptic number.

222121022012001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222121022012001 is a deficient number, since it is larger than the sum of its proper divisors (153956898855199).

222121022012001 is a wasteful number, since it uses less digits than its factorization.

222121022012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175243502725 (or 1175243502719 counting only the distinct ones).

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

Adding to 222121022012001 its reverse (100210220121222), we get a palindrome (322331242133223).

The spelling of 222121022012001 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, twenty-two million, twelve thousand, one".