121887454071 has 4 divisors (see below), whose sum is σ = 162516605432. Its totient is φ = 81258302712.

The previous prime is 121887454061. The next prime is 121887454093. The reversal of 121887454071 is 170454788121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121887454071 - 2²³ = 121879065463 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 121887454071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121887454061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20314575676 + ... + 20314575681.

It is an arithmetic number, because the mean of its divisors is an integer number (40629151358).

Almost surely, 2^121887454071 is an apocalyptic number.

121887454071 is a deficient number, since it is larger than the sum of its proper divisors (40629151361).

121887454071 is an equidigital number, since it uses as much as digits as its factorization.

121887454071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40629151360.

The product of its (nonzero) digits is 501760, while the sum is 48.

The spelling of 121887454071 in words is "one hundred twenty-one billion, eight hundred eighty-seven million, four hundred fifty-four thousand, seventy-one".