122266117721 has 16 divisors (see below), whose sum is σ = 134728265088. Its totient is φ = 110028912000.

The previous prime is 122266117709. The next prime is 122266117747. The reversal of 122266117721 is 127711662221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122266117721 - 2¹⁰ = 122266116697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122266117781) 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, 9140180 + ... + 9153546.

It is an arithmetic number, because the mean of its divisors is an integer number (8420516568).

Almost surely, 2^122266117721 is an apocalyptic number.

122266117721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122266117721 is a deficient number, since it is larger than the sum of its proper divisors (12462147367).

122266117721 is a wasteful number, since it uses less digits than its factorization.

122266117721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21712.

The product of its digits is 28224, while the sum is 38.

Adding to 122266117721 its reverse (127711662221), we get a palindrome (249977779942).

The spelling of 122266117721 in words is "one hundred twenty-two billion, two hundred sixty-six million, one hundred seventeen thousand, seven hundred twenty-one".