121351262278597 has 16 divisors (see below), whose sum is σ = 132325320420720. Its totient is φ = 110614652831232.

The previous prime is 121351262278559. The next prime is 121351262278723. The reversal of 121351262278597 is 795872262153121.

It can be written as a sum of positive squares in 8 ways, for example, as 84520552572036 + 36830709706561 = 9193506^2 + 6068831^2 .

It is a cyclic number.

It is not a de Polignac number, because 121351262278597 - 2⁷ = 121351262278469 is a prime.

It is a super-2 number, since 2×121351262278597² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121351262278507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66948078 + ... + 68736799.

It is an arithmetic number, because the mean of its divisors is an integer number (8270332526295).

Almost surely, 2^{121351262278597} is an apocalyptic number.

It is an amenable number.

121351262278597 is a deficient number, since it is larger than the sum of its proper divisors (10974058142123).

121351262278597 is a wasteful number, since it uses less digits than its factorization.

121351262278597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135685752.

The product of its digits is 25401600, while the sum is 61.

The spelling of 121351262278597 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 ninety-seven".