121031399 has 2 divisors, whose sum is σ = 121031400. Its totient is φ = 121031398.

The previous prime is 121031371. The next prime is 121031429. The reversal of 121031399 is 993130121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121031399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121031899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515699 + 60515700.

It is an arithmetic number, because the mean of its divisors is an integer number (60515700).

Almost surely, 2^121031399 is an apocalyptic number.

121031399 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031399 is an equidigital number, since it uses as much as digits as its factorization.

121031399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 121031399 is about 11001.4271346948. The cubic root of 121031399 is about 494.6515235998.

The spelling of 121031399 in words is "one hundred twenty-one million, thirty-one thousand, three hundred ninety-nine".