122621440517 has 4 divisors (see below), whose sum is σ = 127952807520. Its totient is φ = 117290073516.

The previous prime is 122621440463. The next prime is 122621440537. The reversal of 122621440517 is 715044126221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122621440517 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 (122621440537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2665683467 + ... + 2665683512.

It is an arithmetic number, because the mean of its divisors is an integer number (31988201880).

Almost surely, 2^122621440517 is an apocalyptic number.

It is an amenable number.

122621440517 is a deficient number, since it is larger than the sum of its proper divisors (5331367003).

122621440517 is an equidigital number, since it uses as much as digits as its factorization.

122621440517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331367002.

The product of its (nonzero) digits is 26880, while the sum is 35.

Adding to 122621440517 its reverse (715044126221), we get a palindrome (837665566738).

The spelling of 122621440517 in words is "one hundred twenty-two billion, six hundred twenty-one million, four hundred forty thousand, five hundred seventeen".