121345192765 has 8 divisors (see below), whose sum is σ = 145626165720. Its totient is φ = 97068197952.

The previous prime is 121345192751. The next prime is 121345192777. The reversal of 121345192765 is 567291543121.

It can be written as a sum of positive squares in 4 ways, for example, as 10330283044 + 111014909721 = 101638^2 + 333189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121345192765 - 2¹¹ = 121345190717 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 927010 + ... + 1049779.

It is an arithmetic number, because the mean of its divisors is an integer number (18203270715).

Almost surely, 2^121345192765 is an apocalyptic number.

It is an amenable number.

121345192765 is a deficient number, since it is larger than the sum of its proper divisors (24280972955).

121345192765 is a wasteful number, since it uses less digits than its factorization.

121345192765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989071.

The product of its digits is 453600, while the sum is 46.

The spelling of 121345192765 in words is "one hundred twenty-one billion, three hundred forty-five million, one hundred ninety-two thousand, seven hundred sixty-five".