12012379261 has 2 divisors, whose sum is σ = 12012379262. Its totient is φ = 12012379260.

The previous prime is 12012379243. The next prime is 12012379277. The reversal of 12012379261 is 16297321021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11784188025 + 228191236 = 108555^2 + 15106^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012379261 - 2³¹ = 9864895613 is a prime.

It is a super-2 number, since 2×12012379261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012370261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006189630 + 6006189631.

It is an arithmetic number, because the mean of its divisors is an integer number (6006189631).

Almost surely, 2^12012379261 is an apocalyptic number.

It is an amenable number.

12012379261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012379261 is an equidigital number, since it uses as much as digits as its factorization.

12012379261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 12012379261 in words is "twelve billion, twelve million, three hundred seventy-nine thousand, two hundred sixty-one".