121172812327 has 18 divisors (see below), whose sum is σ = 141987481544. Its totient is φ = 101297604480.

The previous prime is 121172812253. The next prime is 121172812351. The reversal of 121172812327 is 723218271121.

It is not a de Polignac number, because 121172812327 - 2³⁵ = 86813073959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121172815327) 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 17 ways as a sum of consecutive naturals, for example, 37758699 + ... + 37761907.

Almost surely, 2^121172812327 is an apocalyptic number.

121172812327 is a deficient number, since it is larger than the sum of its proper divisors (20814669217).

121172812327 is an frugal number, since it uses more digits than its factorization.

121172812327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507 (or 3257 counting only the distinct ones).

The product of its digits is 18816, while the sum is 37.

The spelling of 121172812327 in words is "one hundred twenty-one billion, one hundred seventy-two million, eight hundred twelve thousand, three hundred twenty-seven".