221891132045 has 8 divisors (see below), whose sum is σ = 290475663840. Its totient is φ = 161375368720.

The previous prime is 221891132033. The next prime is 221891132059. The reversal of 221891132045 is 540231198122.

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

It is not a de Polignac number, because 221891132045 - 2¹⁸ = 221890869901 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017192055 + ... + 2017192164.

It is an arithmetic number, because the mean of its divisors is an integer number (36309457980).

Almost surely, 2^221891132045 is an apocalyptic number.

It is an amenable number.

221891132045 is a deficient number, since it is larger than the sum of its proper divisors (68584531795).

221891132045 is a wasteful number, since it uses less digits than its factorization.

221891132045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034384235.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 221891132045 in words is "two hundred twenty-one billion, eight hundred ninety-one million, one hundred thirty-two thousand, forty-five".