121421299073 has 2 divisors, whose sum is σ = 121421299074. Its totient is φ = 121421299072.

The previous prime is 121421299061. The next prime is 121421299081. The reversal of 121421299073 is 370992124121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90004800064 + 31416499009 = 300008^2 + 177247^2 .

It is a cyclic number.

It is not a de Polignac number, because 121421299073 - 2²⁴ = 121404521857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121421299073.

It is not a weakly prime, because it can be changed into another prime (121421299033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60710649536 + 60710649537.

It is an arithmetic number, because the mean of its divisors is an integer number (60710649537).

Almost surely, 2^121421299073 is an apocalyptic number.

It is an amenable number.

121421299073 is a deficient number, since it is larger than the sum of its proper divisors (1).

121421299073 is an equidigital number, since it uses as much as digits as its factorization.

121421299073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 121421299073 in words is "one hundred twenty-one billion, four hundred twenty-one million, two hundred ninety-nine thousand, seventy-three".