121961011 has 2 divisors, whose sum is σ = 121961012. Its totient is φ = 121961010.

The previous prime is 121960999. The next prime is 121961017. The reversal of 121961011 is 110169121.

It is a strong prime.

It is an emirp because it is prime and its reverse (110169121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121961011 - 2²¹ = 119863859 is a prime.

It is not a weakly prime, because it can be changed into another prime (121961017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60980505 + 60980506.

It is an arithmetic number, because the mean of its divisors is an integer number (60980506).

Almost surely, 2^121961011 is an apocalyptic number.

121961011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121961011 is an equidigital number, since it uses as much as digits as its factorization.

121961011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 22.

The square root of 121961011 is about 11043.5959270520. The cubic root of 121961011 is about 495.9147266581.

The spelling of 121961011 in words is "one hundred twenty-one million, nine hundred sixty-one thousand, eleven".