121001239 has 2 divisors, whose sum is σ = 121001240. Its totient is φ = 121001238.

The previous prime is 121001213. The next prime is 121001249. The reversal of 121001239 is 932100121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121001239 - 2²¹ = 118904087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121001249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500619 + 60500620.

It is an arithmetic number, because the mean of its divisors is an integer number (60500620).

Almost surely, 2^121001239 is an apocalyptic number.

121001239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121001239 is an equidigital number, since it uses as much as digits as its factorization.

121001239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 121001239 is about 11000.0563180376. The cubic root of 121001239 is about 494.6104325291.

The spelling of 121001239 in words is "one hundred twenty-one million, one thousand, two hundred thirty-nine".