121583381 has 2 divisors, whose sum is σ = 121583382. Its totient is φ = 121583380.

The previous prime is 121583353. The next prime is 121583393. The reversal of 121583381 is 183385121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107640625 + 13942756 = 10375^2 + 3734^2 .

It is a cyclic number.

It is not a de Polignac number, because 121583381 - 2¹⁸ = 121321237 is a prime.

It is a super-2 number, since 2×121583381² = 29565037070782322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121583321) 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, 60791690 + 60791691.

It is an arithmetic number, because the mean of its divisors is an integer number (60791691).

Almost surely, 2^121583381 is an apocalyptic number.

It is an amenable number.

121583381 is a deficient number, since it is larger than the sum of its proper divisors (1).

121583381 is an equidigital number, since it uses as much as digits as its factorization.

121583381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 121583381 is about 11026.4854328113. The cubic root of 121583381 is about 495.4023610131.

The spelling of 121583381 in words is "one hundred twenty-one million, five hundred eighty-three thousand, three hundred eighty-one".