121030440139 has 4 divisors (see below), whose sum is σ = 138320503024. Its totient is φ = 103740377256.

The previous prime is 121030440133. The next prime is 121030440143. The reversal of 121030440139 is 931044030121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121030440139 - 2⁵ = 121030440107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121030440133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8645031432 + ... + 8645031445.

It is an arithmetic number, because the mean of its divisors is an integer number (34580125756).

Almost surely, 2^121030440139 is an apocalyptic number.

121030440139 is a deficient number, since it is larger than the sum of its proper divisors (17290062885).

121030440139 is an equidigital number, since it uses as much as digits as its factorization.

121030440139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17290062884.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 121030440139 in words is "one hundred twenty-one billion, thirty million, four hundred forty thousand, one hundred thirty-nine".