12122221019977 has 4 divisors (see below), whose sum is σ = 12147112644736. Its totient is φ = 12097329395220.

The previous prime is 12122221019959. The next prime is 12122221019999. The reversal of 12122221019977 is 77991012222121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12122221019977 - 2⁴³ = 3326127997769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122221019677) 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, 12445811649 + ... + 12445812622.

It is an arithmetic number, because the mean of its divisors is an integer number (3036778161184).

Almost surely, 2^{12122221019977} is an apocalyptic number.

It is an amenable number.

12122221019977 is a deficient number, since it is larger than the sum of its proper divisors (24891624759).

12122221019977 is an equidigital number, since it uses as much as digits as its factorization.

12122221019977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24891624758.

The product of its (nonzero) digits is 127008, while the sum is 46.

The spelling of 12122221019977 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, nineteen thousand, nine hundred seventy-seven".