121351262278559 has 2 divisors, whose sum is σ = 121351262278560. Its totient is φ = 121351262278558.

The previous prime is 121351262278507. The next prime is 121351262278723. The reversal of 121351262278559 is 955872262153121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121351262278559 - 2²⁰ = 121351261229983 is a prime.

It is a super-2 number, since 2×121351262278559² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121351262278498 and 121351262278507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121351262278759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675631139279 + 60675631139280.

It is an arithmetic number, because the mean of its divisors is an integer number (60675631139280).

Almost surely, 2^{121351262278559} is an apocalyptic number.

121351262278559 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351262278559 is an equidigital number, since it uses as much as digits as its factorization.

121351262278559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144000, while the sum is 59.

The spelling of 121351262278559 in words is "one hundred twenty-one trillion, three hundred fifty-one billion, two hundred sixty-two million, two hundred seventy-eight thousand, five hundred fifty-nine".