221100212330291 has 16 divisors (see below), whose sum is σ = 254102320339200. Its totient is φ = 188452234421088.

The previous prime is 221100212330209. The next prime is 221100212330293. The reversal of 221100212330291 is 192033212001122.

It is a cyclic number.

It is not a de Polignac number, because 221100212330291 - 2²² = 221100208135987 is a prime.

It is a super-2 number, since 2×221100212330291² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100212330293) 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, 67142876 + ... + 70358838.

It is an arithmetic number, because the mean of its divisors is an integer number (15881395021200).

Almost surely, 2^{221100212330291} is an apocalyptic number.

221100212330291 is a deficient number, since it is larger than the sum of its proper divisors (33002108008909).

221100212330291 is a wasteful number, since it uses less digits than its factorization.

221100212330291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271018.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 221100212330291 in words is "two hundred twenty-one trillion, one hundred billion, two hundred twelve million, three hundred thirty thousand, two hundred ninety-one".