121406331 has 16 divisors (see below), whose sum is σ = 164597760. Its totient is φ = 79584960.

The previous prime is 121406309. The next prime is 121406357. The reversal of 121406331 is 133604121.

It is not a de Polignac number, because 121406331 - 2⁹ = 121405819 is a prime.

It is a super-2 number, since 2×121406331² = 29478994413763122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121406298 and 121406307.

It is not an unprimeable number, because it can be changed into a prime (121406381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65686 + ... + 67508.

It is an arithmetic number, because the mean of its divisors is an integer number (10287360).

Almost surely, 2^121406331 is an apocalyptic number.

121406331 is a deficient number, since it is larger than the sum of its proper divisors (43191429).

121406331 is a wasteful number, since it uses less digits than its factorization.

121406331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 121406331 is about 11018.4541111719. The cubic root of 121406331 is about 495.1617755078.

The spelling of 121406331 in words is "one hundred twenty-one million, four hundred six thousand, three hundred thirty-one".