12077356731221 has 4 divisors (see below), whose sum is σ = 12084025621344. Its totient is φ = 12070687841100.

The previous prime is 12077356731131. The next prime is 12077356731239. The reversal of 12077356731221 is 12213765377021.

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 12077356731221 - 2²⁶ = 12077289622357 is a prime.

It is a super-2 number, since 2×12077356731221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12077356731241) 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, 3334442345 + ... + 3334445966.

It is an arithmetic number, because the mean of its divisors is an integer number (3021006405336).

Almost surely, 2^{12077356731221} is an apocalyptic number.

It is an amenable number.

12077356731221 is a deficient number, since it is larger than the sum of its proper divisors (6668890123).

12077356731221 is an equidigital number, since it uses as much as digits as its factorization.

12077356731221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6668890122.

The product of its (nonzero) digits is 740880, while the sum is 47.

The spelling of 12077356731221 in words is "twelve trillion, seventy-seven billion, three hundred fifty-six million, seven hundred thirty-one thousand, two hundred twenty-one".