12122021009977 has 4 divisors (see below), whose sum is σ = 12122563428900. Its totient is φ = 12121478591056.

The previous prime is 12122021009963. The next prime is 12122021009993. The reversal of 12122021009977 is 77990012022121.

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 3459659520256 + 8662361489721 = 1860016^2 + 2943189^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122021009977 - 2³¹ = 12119873526329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122021009957) 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, 271175938 + ... + 271220635.

It is an arithmetic number, because the mean of its divisors is an integer number (3030640857225).

Almost surely, 2^{12122021009977} is an apocalyptic number.

It is an amenable number.

12122021009977 is a deficient number, since it is larger than the sum of its proper divisors (542418923).

12122021009977 is an equidigital number, since it uses as much as digits as its factorization.

12122021009977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542418922.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 12122021009977 in words is "twelve trillion, one hundred twenty-two billion, twenty-one million, nine thousand, nine hundred seventy-seven".