222020021987 has 4 divisors (see below), whose sum is σ = 222024767976. Its totient is φ = 222015276000.

The previous prime is 222020021963. The next prime is 222020021999. The reversal of 222020021987 is 789120020222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222020021987 - 2⁸ = 222020021731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222020041987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302118 + ... + 2396619.

It is an arithmetic number, because the mean of its divisors is an integer number (55506191994).

Almost surely, 2^222020021987 is an apocalyptic number.

222020021987 is a deficient number, since it is larger than the sum of its proper divisors (4745989).

222020021987 is an equidigital number, since it uses as much as digits as its factorization.

222020021987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745988.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 222020021987 in words is "two hundred twenty-two billion, twenty million, twenty-one thousand, nine hundred eighty-seven".