121126939 has 4 divisors (see below), whose sum is σ = 125303760. Its totient is φ = 116950120.

The previous prime is 121126933. The next prime is 121126949. The reversal of 121126939 is 939621121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939621121 = 229 ⋅4103149.

It is a cyclic number.

It is not a de Polignac number, because 121126939 - 2⁹ = 121126427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121126933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088367 + ... + 2088424.

It is an arithmetic number, because the mean of its divisors is an integer number (31325940).

Almost surely, 2^121126939 is an apocalyptic number.

121126939 is a deficient number, since it is larger than the sum of its proper divisors (4176821).

121126939 is an equidigital number, since it uses as much as digits as its factorization.

121126939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176820.

The product of its digits is 5832, while the sum is 34.

The square root of 121126939 is about 11005.7684420489. The cubic root of 121126939 is about 494.7816456929.

The spelling of 121126939 in words is "one hundred twenty-one million, one hundred twenty-six thousand, nine hundred thirty-nine".