121426381 has 2 divisors, whose sum is σ = 121426382. Its totient is φ = 121426380.

The previous prime is 121426373. The next prime is 121426387. The reversal of 121426381 is 183624121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114297481 + 7128900 = 10691^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 121426381 - 2³ = 121426373 is a prime.

It is a super-2 number, since 2×121426381² = 29488732005514322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121426387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60713190 + 60713191.

It is an arithmetic number, because the mean of its divisors is an integer number (60713191).

Almost surely, 2^121426381 is an apocalyptic number.

It is an amenable number.

121426381 is a deficient number, since it is larger than the sum of its proper divisors (1).

121426381 is an equidigital number, since it uses as much as digits as its factorization.

121426381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

The square root of 121426381 is about 11019.3639108616. The cubic root of 121426381 is about 495.1890323156.

The spelling of 121426381 in words is "one hundred twenty-one million, four hundred twenty-six thousand, three hundred eighty-one".