122621720147 has 4 divisors (see below), whose sum is σ = 122697088536. Its totient is φ = 122546351760.

The previous prime is 122621720093. The next prime is 122621720149. The reversal of 122621720147 is 741027126221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122621720147 - 2²² = 122617525843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122621720149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37681754 + ... + 37685007.

It is an arithmetic number, because the mean of its divisors is an integer number (30674272134).

Almost surely, 2^122621720147 is an apocalyptic number.

122621720147 is a deficient number, since it is larger than the sum of its proper divisors (75368389).

122621720147 is an equidigital number, since it uses as much as digits as its factorization.

122621720147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75368388.

The product of its (nonzero) digits is 18816, while the sum is 35.

Adding to 122621720147 its reverse (741027126221), we get a palindrome (863648846368).

The spelling of 122621720147 in words is "one hundred twenty-two billion, six hundred twenty-one million, seven hundred twenty thousand, one hundred forty-seven".