221023109987 has 8 divisors (see below), whose sum is σ = 234030186432. Its totient is φ = 208016668800.

The previous prime is 221023109933. The next prime is 221023109999. The reversal of 221023109987 is 789901320122.

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 221023109987 - 2¹⁰ = 221023108963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221023109927) 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, 685937 + ... + 955277.

It is an arithmetic number, because the mean of its divisors is an integer number (29253773304).

Almost surely, 2^221023109987 is an apocalyptic number.

221023109987 is a deficient number, since it is larger than the sum of its proper divisors (13007076445).

221023109987 is a wasteful number, since it uses less digits than its factorization.

221023109987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317629.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 221023109987 in words is "two hundred twenty-one billion, twenty-three million, one hundred nine thousand, nine hundred eighty-seven".