12100042892261 has 2 divisors, whose sum is σ = 12100042892262. Its totient is φ = 12100042892260.

The previous prime is 12100042892257. The next prime is 12100042892281. The reversal of 12100042892261 is 16229824000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8005470407236 + 4094572485025 = 2829394^2 + 2023505^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100042892261 - 2² = 12100042892257 is a prime.

It is a super-2 number, since 2×12100042892261² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100042892281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050021446130 + 6050021446131.

It is an arithmetic number, because the mean of its divisors is an integer number (6050021446131).

Almost surely, 2^{12100042892261} is an apocalyptic number.

It is an amenable number.

12100042892261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100042892261 is an equidigital number, since it uses as much as digits as its factorization.

12100042892261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

Adding to 12100042892261 its reverse (16229824000121), we get a palindrome (28329866892382).

The spelling of 12100042892261 in words is "twelve trillion, one hundred billion, forty-two million, eight hundred ninety-two thousand, two hundred sixty-one".