121120121939 has 2 divisors, whose sum is σ = 121120121940. Its totient is φ = 121120121938.

The previous prime is 121120121893. The next prime is 121120122017. The reversal of 121120121939 is 939121021121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121120121939 - 2¹² = 121120117843 is a prime.

It is not a weakly prime, because it can be changed into another prime (121120123939) 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, 60560060969 + 60560060970.

It is an arithmetic number, because the mean of its divisors is an integer number (60560060970).

Almost surely, 2^121120121939 is an apocalyptic number.

121120121939 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120121939 is an equidigital number, since it uses as much as digits as its factorization.

121120121939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 121120121939 in words is "one hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, nine hundred thirty-nine".