121019993 has 2 divisors, whose sum is σ = 121019994. Its totient is φ = 121019992.

The previous prime is 121019989. The next prime is 121019999. The reversal of 121019993 is 399910121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120384784 + 635209 = 10972^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 121019993 - 2² = 121019989 is a prime.

It is not a weakly prime, because it can be changed into another prime (121019999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60509996 + 60509997.

It is an arithmetic number, because the mean of its divisors is an integer number (60509997).

Almost surely, 2^121019993 is an apocalyptic number.

It is an amenable number.

121019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

121019993 is an equidigital number, since it uses as much as digits as its factorization.

121019993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 121019993 is about 11000.9087351909. The cubic root of 121019993 is about 494.6359844572.

The spelling of 121019993 in words is "one hundred twenty-one million, nineteen thousand, nine hundred ninety-three".