2112211019977 has 4 divisors (see below), whose sum is σ = 2118263200900. Its totient is φ = 2106158839056.

The previous prime is 2112211019927. The next prime is 2112211020013. The reversal of 2112211019977 is 7799101122112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1822362302601 + 289848717376 = 1349949^2 + 538376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112211019977 - 2¹⁵ = 2112210987209 is a prime.

It is a super-2 number, since 2×2112211019977² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112211019917) 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, 3026089938 + ... + 3026090635.

It is an arithmetic number, because the mean of its divisors is an integer number (529565800225).

Almost surely, 2^{2112211019977} is an apocalyptic number.

It is an amenable number.

2112211019977 is a deficient number, since it is larger than the sum of its proper divisors (6052180923).

2112211019977 is an equidigital number, since it uses as much as digits as its factorization.

2112211019977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052180922.

The product of its (nonzero) digits is 31752, while the sum is 43.

The spelling of 2112211019977 in words is "two trillion, one hundred twelve billion, two hundred eleven million, nineteen thousand, nine hundred seventy-seven".