122621440447 has 16 divisors (see below), whose sum is σ = 138572006400. Its totient is φ = 107496820800.

The previous prime is 122621440433. The next prime is 122621440463. The reversal of 122621440447 is 744044126221.

It is a cyclic number.

It is not a de Polignac number, because 122621440447 - 2²⁷ = 122487222719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122621440427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538822 + ... + 731827.

It is an arithmetic number, because the mean of its divisors is an integer number (8660750400).

Almost surely, 2^122621440447 is an apocalyptic number.

122621440447 is a deficient number, since it is larger than the sum of its proper divisors (15950565953).

122621440447 is a wasteful number, since it uses less digits than its factorization.

122621440447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270974.

The product of its (nonzero) digits is 86016, while the sum is 37.

Adding to 122621440447 its reverse (744044126221), we get a palindrome (866665566668).

The spelling of 122621440447 in words is "one hundred twenty-two billion, six hundred twenty-one million, four hundred forty thousand, four hundred forty-seven".