222221111112001 has 4 divisors (see below), whose sum is σ = 222267884661504. Its totient is φ = 222174337562500.

The previous prime is 222221111111947. The next prime is 222221111112043. The reversal of 222221111112001 is 100211111122222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222221111112001 - 2⁴³ = 213425018089793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222221111112001.

It is not an unprimeable number, because it can be changed into a prime (222221111115001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23386767625 + ... + 23386777126.

It is an arithmetic number, because the mean of its divisors is an integer number (55566971165376).

Almost surely, 2^{222221111112001} is an apocalyptic number.

It is an amenable number.

222221111112001 is a deficient number, since it is larger than the sum of its proper divisors (46773549503).

222221111112001 is an equidigital number, since it uses as much as digits as its factorization.

222221111112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46773549502.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222221111112001 its reverse (100211111122222), we get a palindrome (322432222234223).

The spelling of 222221111112001 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, one".