121746450291 has 16 divisors (see below), whose sum is σ = 162673970976. Its totient is φ = 80991737856.

The previous prime is 121746450281. The next prime is 121746450307. The reversal of 121746450291 is 192054647121.

It is not a de Polignac number, because 121746450291 - 2³³ = 113156515699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121746450281) 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, 4385631 + ... + 4413303.

It is an arithmetic number, because the mean of its divisors is an integer number (10167123186).

Almost surely, 2^121746450291 is an apocalyptic number.

121746450291 is a deficient number, since it is larger than the sum of its proper divisors (40927520685).

121746450291 is a wasteful number, since it uses less digits than its factorization.

121746450291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30742.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 121746450291 in words is "one hundred twenty-one billion, seven hundred forty-six million, four hundred fifty thousand, two hundred ninety-one".