121615737053 has 4 divisors (see below), whose sum is σ = 122390359740. Its totient is φ = 120841114368.

The previous prime is 121615737041. The next prime is 121615737091. The reversal of 121615737053 is 350737516121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 350737516121 = 47 ⋅7462500343.

It can be written as a sum of positive squares in 2 ways, for example, as 22493400484 + 99122336569 = 149978^2 + 314837^2 .

It is a cyclic number.

It is not a de Polignac number, because 121615737053 - 2¹⁴ = 121615720669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121615737053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121615737253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387311108 + ... + 387311421.

It is an arithmetic number, because the mean of its divisors is an integer number (30597589935).

Almost surely, 2^121615737053 is an apocalyptic number.

It is an amenable number.

121615737053 is a deficient number, since it is larger than the sum of its proper divisors (774622687).

121615737053 is an equidigital number, since it uses as much as digits as its factorization.

121615737053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774622686.

The product of its (nonzero) digits is 132300, while the sum is 41.

The spelling of 121615737053 in words is "one hundred twenty-one billion, six hundred fifteen million, seven hundred thirty-seven thousand, fifty-three".