121491369259 has 8 divisors (see below), whose sum is σ = 131021406320. Its totient is φ = 111987696096.

The previous prime is 121491369253. The next prime is 121491369287. The reversal of 121491369259 is 952963194121.

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 121491369259 - 2³¹ = 119343885611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121491369253) 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 7 ways as a sum of consecutive naturals, for example, 6581397 + ... + 6599830.

It is an arithmetic number, because the mean of its divisors is an integer number (16377675790).

Almost surely, 2^121491369259 is an apocalyptic number.

121491369259 is a deficient number, since it is larger than the sum of its proper divisors (9530037061).

121491369259 is a wasteful number, since it uses less digits than its factorization.

121491369259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13181949.

The product of its digits is 1049760, while the sum is 52.

The spelling of 121491369259 in words is "one hundred twenty-one billion, four hundred ninety-one million, three hundred sixty-nine thousand, two hundred fifty-nine".