121131739 has 4 divisors (see below), whose sum is σ = 121202824. Its totient is φ = 121060656.

The previous prime is 121131733. The next prime is 121131743. The reversal of 121131739 is 937131121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937131121 = 43 ⋅21793747.

It is a cyclic number.

It is not a de Polignac number, because 121131739 - 2¹¹ = 121129691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121131733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32922 + ... + 36415.

It is an arithmetic number, because the mean of its divisors is an integer number (30300706).

Almost surely, 2^121131739 is an apocalyptic number.

121131739 is a deficient number, since it is larger than the sum of its proper divisors (71085).

121131739 is an equidigital number, since it uses as much as digits as its factorization.

121131739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71084.

The product of its digits is 1134, while the sum is 28.

The square root of 121131739 is about 11005.9865073514. The cubic root of 121131739 is about 494.7881813173.

The spelling of 121131739 in words is "one hundred twenty-one million, one hundred thirty-one thousand, seven hundred thirty-nine".