121940733401 has 2 divisors, whose sum is σ = 121940733402. Its totient is φ = 121940733400.

The previous prime is 121940733367. The next prime is 121940733413. The reversal of 121940733401 is 104337049121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62782819225 + 59157914176 = 250565^2 + 243224^2 .

It is an emirp because it is prime and its reverse (104337049121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121940733401 - 2⁶ = 121940733337 is a prime.

It is not a weakly prime, because it can be changed into another prime (121940733451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60970366700 + 60970366701.

It is an arithmetic number, because the mean of its divisors is an integer number (60970366701).

Almost surely, 2^121940733401 is an apocalyptic number.

It is an amenable number.

121940733401 is a deficient number, since it is larger than the sum of its proper divisors (1).

121940733401 is an equidigital number, since it uses as much as digits as its factorization.

121940733401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 121940733401 in words is "one hundred twenty-one billion, nine hundred forty million, seven hundred thirty-three thousand, four hundred one".