121966831 has 6 divisors (see below), whose sum is σ = 141879840. Its totient is φ = 104542956.

The previous prime is 121966829. The next prime is 121966843. The reversal of 121966831 is 138669121.

It is not a de Polignac number, because 121966831 - 2¹ = 121966829 is a prime.

It is a super-2 number, since 2×121966831² = 29751815728365122, 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 (121966811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1244511 + ... + 1244608.

It is an arithmetic number, because the mean of its divisors is an integer number (23646640).

Almost surely, 2^121966831 is an apocalyptic number.

121966831 is a deficient number, since it is larger than the sum of its proper divisors (19913009).

121966831 is an equidigital number, since it uses as much as digits as its factorization.

121966831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489133 (or 2489126 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 121966831 is about 11043.8594250380. The cubic root of 121966831 is about 495.9226149107.

The spelling of 121966831 in words is "one hundred twenty-one million, nine hundred sixty-six thousand, eight hundred thirty-one".