121678831 has 8 divisors (see below), whose sum is σ = 130500720. Its totient is φ = 113098752.

The previous prime is 121678819. The next prime is 121678849. The reversal of 121678831 is 138876121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121678831 is a prime.

It is a super-2 number, since 2×121678831² = 29611475827053122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121678861) 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, 59410 + ... + 61423.

It is an arithmetic number, because the mean of its divisors is an integer number (16312590).

Almost surely, 2^121678831 is an apocalyptic number.

121678831 is a deficient number, since it is larger than the sum of its proper divisors (8821889).

121678831 is a wasteful number, since it uses less digits than its factorization.

121678831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120905.

The product of its digits is 16128, while the sum is 37.

The square root of 121678831 is about 11030.8127987016. The cubic root of 121678831 is about 495.5319669571.

The spelling of 121678831 in words is "one hundred twenty-one million, six hundred seventy-eight thousand, eight hundred thirty-one".