121364881491 has 8 divisors (see below), whose sum is σ = 184936962304. Its totient is φ = 69351360840.

The previous prime is 121364881489. The next prime is 121364881513. The reversal of 121364881491 is 194188463121.

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

It is not a de Polignac number, because 121364881491 - 2¹ = 121364881489 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 121364881491.

It is not an unprimeable number, because it can be changed into a prime (121364881291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2889640015 + ... + 2889640056.

It is an arithmetic number, because the mean of its divisors is an integer number (23117120288).

Almost surely, 2^121364881491 is an apocalyptic number.

121364881491 is a deficient number, since it is larger than the sum of its proper divisors (63572080813).

121364881491 is an equidigital number, since it uses as much as digits as its factorization.

121364881491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779280081.

The product of its digits is 331776, while the sum is 48.

The spelling of 121364881491 in words is "one hundred twenty-one billion, three hundred sixty-four million, eight hundred eighty-one thousand, four hundred ninety-one".