12121944891337 has 2 divisors, whose sum is σ = 12121944891338. Its totient is φ = 12121944891336.

The previous prime is 12121944891323. The next prime is 12121944891341. The reversal of 12121944891337 is 73319844912121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6538842237456 + 5583102653881 = 2557116^2 + 2362859^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121944891337 - 2³⁵ = 12087585152969 is a prime.

It is a super-2 number, since 2×12121944891337² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121944891737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060972445668 + 6060972445669.

It is an arithmetic number, because the mean of its divisors is an integer number (6060972445669).

Almost surely, 2^{12121944891337} is an apocalyptic number.

It is an amenable number.

12121944891337 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121944891337 is an equidigital number, since it uses as much as digits as its factorization.

12121944891337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The spelling of 12121944891337 in words is "twelve trillion, one hundred twenty-one billion, nine hundred forty-four million, eight hundred ninety-one thousand, three hundred thirty-seven".