121752105149 has 2 divisors, whose sum is σ = 121752105150. Its totient is φ = 121752105148.

The previous prime is 121752105131. The next prime is 121752105217. The reversal of 121752105149 is 941501257121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115001017924 + 6751087225 = 339118^2 + 82165^2 .

It is a cyclic number.

It is not a de Polignac number, because 121752105149 - 2⁸ = 121752104893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121752105749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60876052574 + 60876052575.

It is an arithmetic number, because the mean of its divisors is an integer number (60876052575).

Almost surely, 2^121752105149 is an apocalyptic number.

It is an amenable number.

121752105149 is a deficient number, since it is larger than the sum of its proper divisors (1).

121752105149 is an equidigital number, since it uses as much as digits as its factorization.

121752105149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 38.

The spelling of 121752105149 in words is "one hundred twenty-one billion, seven hundred fifty-two million, one hundred five thousand, one hundred forty-nine".