12031019912921 has 2 divisors, whose sum is σ = 12031019912922. Its totient is φ = 12031019912920.

The previous prime is 12031019912887. The next prime is 12031019912959. The reversal of 12031019912921 is 12921991013021.

12031019912921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7504065816025 + 4526954096896 = 2739355^2 + 2127664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12031019912921 is a prime.

It is not a weakly prime, because it can be changed into another prime (12031019912521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015509956460 + 6015509956461.

It is an arithmetic number, because the mean of its divisors is an integer number (6015509956461).

Almost surely, 2^{12031019912921} is an apocalyptic number.

It is an amenable number.

12031019912921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031019912921 is an equidigital number, since it uses as much as digits as its factorization.

12031019912921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 12031019912921 in words is "twelve trillion, thirty-one billion, nineteen million, nine hundred twelve thousand, nine hundred twenty-one".