121440377 has 2 divisors, whose sum is σ = 121440378. Its totient is φ = 121440376.

The previous prime is 121440359. The next prime is 121440409. The reversal of 121440377 is 773044121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115369081 + 6071296 = 10741^2 + 2464^2 .

It is a cyclic number.

It is not a de Polignac number, because 121440377 - 2¹² = 121436281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121440307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60720188 + 60720189.

It is an arithmetic number, because the mean of its divisors is an integer number (60720189).

Almost surely, 2^121440377 is an apocalyptic number.

It is an amenable number.

121440377 is a deficient number, since it is larger than the sum of its proper divisors (1).

121440377 is an equidigital number, since it uses as much as digits as its factorization.

121440377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 121440377 is about 11019.9989564428. The cubic root of 121440377 is about 495.2080572847.

Adding to 121440377 its reverse (773044121), we get a palindrome (894484498).

The spelling of 121440377 in words is "one hundred twenty-one million, four hundred forty thousand, three hundred seventy-seven".