121012393 has 2 divisors, whose sum is σ = 121012394. Its totient is φ = 121012392.

The previous prime is 121012379. The next prime is 121012403. The reversal of 121012393 is 393210121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96884649 + 24127744 = 9843^2 + 4912^2 .

It is an emirp because it is prime and its reverse (393210121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121012393 - 2¹³ = 121004201 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506196 + 60506197.

It is an arithmetic number, because the mean of its divisors is an integer number (60506197).

Almost surely, 2^121012393 is an apocalyptic number.

It is an amenable number.

121012393 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012393 is an equidigital number, since it uses as much as digits as its factorization.

121012393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 121012393 is about 11000.5633037586. The cubic root of 121012393 is about 494.6256299362.

The spelling of 121012393 in words is "one hundred twenty-one million, twelve thousand, three hundred ninety-three".