121440049 has 2 divisors, whose sum is σ = 121440050. Its totient is φ = 121440048.

The previous prime is 121440047. The next prime is 121440071. The reversal of 121440049 is 940044121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 56927025 = 8032^2 + 7545^2 .

It is a cyclic number.

It is not a de Polignac number, because 121440049 - 2¹ = 121440047 is a prime.

It is a super-2 number, since 2×121440049² = 29495371002244802, which contains 22 as substring.

Together with 121440047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121440047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60720024 + 60720025.

It is an arithmetic number, because the mean of its divisors is an integer number (60720025).

Almost surely, 2^121440049 is an apocalyptic number.

It is an amenable number.

121440049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121440049 is an equidigital number, since it uses as much as digits as its factorization.

121440049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 121440049 is about 11019.9840743987. The cubic root of 121440049 is about 495.2076114462.

The spelling of 121440049 in words is "one hundred twenty-one million, four hundred forty thousand, forty-nine".