121231039 has 4 divisors (see below), whose sum is σ = 127611640. Its totient is φ = 114850440.

The previous prime is 121231031. The next prime is 121231079. The reversal of 121231039 is 930132121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930132121 = 23 ⋅40440527.

It is not a de Polignac number, because 121231039 - 2³ = 121231031 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 (121231031) 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 3 ways as a sum of consecutive naturals, for example, 3190272 + ... + 3190309.

It is an arithmetic number, because the mean of its divisors is an integer number (31902910).

Almost surely, 2^121231039 is an apocalyptic number.

121231039 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121231039 is a deficient number, since it is larger than the sum of its proper divisors (6380601).

121231039 is an equidigital number, since it uses as much as digits as its factorization.

121231039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380600.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 121231039 is about 11010.4967644516. The cubic root of 121231039 is about 494.9233483323.

The spelling of 121231039 in words is "one hundred twenty-one million, two hundred thirty-one thousand, thirty-nine".