222154525451221 has 8 divisors (see below), whose sum is σ = 242351024001984. Its totient is φ = 201958132333920.

The previous prime is 222154525451207. The next prime is 222154525451249. The reversal of 222154525451221 is 122154525451222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222154525451221 - 2¹¹ = 222154525449173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222154525451281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21920200 + ... + 30410593.

It is an arithmetic number, because the mean of its divisors is an integer number (30293878000248).

Almost surely, 2^{222154525451221} is an apocalyptic number.

It is an amenable number.

222154525451221 is a deficient number, since it is larger than the sum of its proper divisors (20196498550763).

222154525451221 is a wasteful number, since it uses less digits than its factorization.

222154525451221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52716731.

The product of its digits is 640000, while the sum is 43.

Subtracting from 222154525451221 its reverse (122154525451222), we obtain a palindrome (99999999999999).

The spelling of 222154525451221 in words is "two hundred twenty-two trillion, one hundred fifty-four billion, five hundred twenty-five million, four hundred fifty-one thousand, two hundred twenty-one".