121171719312 has 100 divisors (see below), whose sum is σ = 400807013376. Its totient is φ = 34620488640.

The previous prime is 121171719311. The next prime is 121171719313. The reversal of 121171719312 is 213917171121.

It is an interprime number because it is at equal distance from previous prime (121171719311) and next prime (121171719313).

It is a super-2 number, since 2×121171719312² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (121171719311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6669264 + ... + 6687407.

Almost surely, 2^121171719312 is an apocalyptic number.

121171719312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121171719312 is an abundant number, since it is smaller than the sum of its proper divisors (279635294064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121171719312 is a wasteful number, since it uses less digits than its factorization.

121171719312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13356698 (or 13356683 counting only the distinct ones).

The product of its digits is 5292, while the sum is 36.

The spelling of 121171719312 in words is "one hundred twenty-one billion, one hundred seventy-one million, seven hundred nineteen thousand, three hundred twelve".