121406291 has 2 divisors, whose sum is σ = 121406292. Its totient is φ = 121406290.

The previous prime is 121406273. The next prime is 121406297. The reversal of 121406291 is 192604121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121406291 - 2²⁶ = 54297427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121406291.

It is not a weakly prime, because it can be changed into another prime (121406297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60703145 + 60703146.

It is an arithmetic number, because the mean of its divisors is an integer number (60703146).

Almost surely, 2^121406291 is an apocalyptic number.

121406291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121406291 is an equidigital number, since it uses as much as digits as its factorization.

121406291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 121406291 is about 11018.4522960350. The cubic root of 121406291 is about 495.1617211271.

The spelling of 121406291 in words is "one hundred twenty-one million, four hundred six thousand, two hundred ninety-one".