121330691 has 2 divisors, whose sum is σ = 121330692. Its totient is φ = 121330690.

The previous prime is 121330679. The next prime is 121330721. The reversal of 121330691 is 196033121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121330691 is a prime.

It is a super-2 number, since 2×121330691² = 29442273157074962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121330691.

It is not a weakly prime, because it can be changed into another prime (121330661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665345 + 60665346.

It is an arithmetic number, because the mean of its divisors is an integer number (60665346).

Almost surely, 2^121330691 is an apocalyptic number.

121330691 is a deficient number, since it is larger than the sum of its proper divisors (1).

121330691 is an equidigital number, since it uses as much as digits as its factorization.

121330691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 121330691 is about 11015.0211529529. The cubic root of 121330691 is about 495.0589203067.

The spelling of 121330691 in words is "one hundred twenty-one million, three hundred thirty thousand, six hundred ninety-one".