122621371447 has 4 divisors (see below), whose sum is σ = 122690377936. Its totient is φ = 122552364960.

The previous prime is 122621371423. The next prime is 122621371469. The reversal of 122621371447 is 744173126221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744173126221 = 7 ⋅106310446603.

It is a cyclic number.

It is not a de Polignac number, because 122621371447 - 2¹⁹ = 122620847159 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 (122621371247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34500579 + ... + 34504132.

It is an arithmetic number, because the mean of its divisors is an integer number (30672594484).

Almost surely, 2^122621371447 is an apocalyptic number.

122621371447 is a deficient number, since it is larger than the sum of its proper divisors (69006489).

122621371447 is an equidigital number, since it uses as much as digits as its factorization.

122621371447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69006488.

The product of its digits is 112896, while the sum is 40.

Adding to 122621371447 its reverse (744173126221), we get a palindrome (866794497668).

The spelling of 122621371447 in words is "one hundred twenty-two billion, six hundred twenty-one million, three hundred seventy-one thousand, four hundred forty-seven".