2021222111987 has 16 divisors (see below), whose sum is σ = 2199292980192. Its totient is φ = 1846473408000.

The previous prime is 2021222111977. The next prime is 2021222112031. The reversal of 2021222111987 is 7891112221202.

It is not a de Polignac number, because 2021222111987 - 2⁸ = 2021222111731 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 2021222111987.

It is not an unprimeable number, because it can be changed into a prime (2021222111917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1460438 + ... + 2485019.

It is an arithmetic number, because the mean of its divisors is an integer number (137455811262).

Almost surely, 2^{2021222111987} is an apocalyptic number.

2021222111987 is a deficient number, since it is larger than the sum of its proper divisors (178070868205).

2021222111987 is a wasteful number, since it uses less digits than its factorization.

2021222111987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945878.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 2021222111987 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, nine hundred eighty-seven".