221101212118 has 32 divisors (see below), whose sum is σ = 353511019008. Its totient is φ = 103352131200.

The previous prime is 221101212113. The next prime is 221101212139. The reversal of 221101212118 is 811212101122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101212113) 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, 8566573 + ... + 8592343.

It is an arithmetic number, because the mean of its divisors is an integer number (11047219344).

Almost surely, 2^221101212118 is an apocalyptic number.

221101212118 is a deficient number, since it is larger than the sum of its proper divisors (132409806890).

221101212118 is a wasteful number, since it uses less digits than its factorization.

221101212118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27468.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 221101212118 in words is "two hundred twenty-one billion, one hundred one million, two hundred twelve thousand, one hundred eighteen".