121440077 has 24 divisors (see below), whose sum is σ = 142171680. Its totient is φ = 103356000.

The previous prime is 121440071. The next prime is 121440079. The reversal of 121440077 is 770044121.

It is not a de Polignac number, because 121440077 - 2⁸ = 121439821 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121440071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 231938 + ... + 232460.

It is an arithmetic number, because the mean of its divisors is an integer number (5923820).

Almost surely, 2^121440077 is an apocalyptic number.

It is an amenable number.

121440077 is a deficient number, since it is larger than the sum of its proper divisors (20731603).

121440077 is a wasteful number, since it uses less digits than its factorization.

121440077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 121440077 is about 11019.9853448178. The cubic root of 121440077 is about 495.2076495056.

Adding to 121440077 its reverse (770044121), we get a palindrome (891484198).

The spelling of 121440077 in words is "one hundred twenty-one million, four hundred forty thousand, seventy-seven".