220101021987 has 32 divisors (see below), whose sum is σ = 367739564544. Its totient is φ = 113757772800.

The previous prime is 220101021967. The next prime is 220101022013. The reversal of 220101021987 is 789120101022.

It is not a de Polignac number, because 220101021987 - 2⁷ = 220101021859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (220101021937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2372814 + ... + 2463827.

It is an arithmetic number, because the mean of its divisors is an integer number (11491861392).

Almost surely, 2^220101021987 is an apocalyptic number.

220101021987 is a deficient number, since it is larger than the sum of its proper divisors (147638542557).

220101021987 is a wasteful number, since it uses less digits than its factorization.

220101021987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836859.

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 220101021987 in words is "two hundred twenty billion, one hundred one million, twenty-one thousand, nine hundred eighty-seven".