33121242139 has 2 divisors, whose sum is σ = 33121242140. Its totient is φ = 33121242138.

The previous prime is 33121242131. The next prime is 33121242151. The reversal of 33121242139 is 93124212133.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33121242139 - 2³ = 33121242131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33121242139.

It is not a weakly prime, because it can be changed into another prime (33121242131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560621069 + 16560621070.

It is an arithmetic number, because the mean of its divisors is an integer number (16560621070).

Almost surely, 2^33121242139 is an apocalyptic number.

33121242139 is a deficient number, since it is larger than the sum of its proper divisors (1).

33121242139 is an equidigital number, since it uses as much as digits as its factorization.

33121242139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The spelling of 33121242139 in words is "thirty-three billion, one hundred twenty-one million, two hundred forty-two thousand, one hundred thirty-nine".