221370846861 has 8 divisors (see below), whose sum is σ = 295349496064. Its totient is φ = 147486381120.

The previous prime is 221370846841. The next prime is 221370846887. The reversal of 221370846861 is 168648073122.

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

It is not a de Polignac number, because 221370846861 - 2⁷ = 221370846733 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 221370846861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221370846841) 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, 23540380 + ... + 23549781.

It is an arithmetic number, because the mean of its divisors is an integer number (36918687008).

Almost surely, 2^221370846861 is an apocalyptic number.

It is an amenable number.

221370846861 is a deficient number, since it is larger than the sum of its proper divisors (73978649203).

221370846861 is a wasteful number, since it uses less digits than its factorization.

221370846861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47091731.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 221370846861 in words is "two hundred twenty-one billion, three hundred seventy million, eight hundred forty-six thousand, eight hundred sixty-one".