122220999945 has 48 divisors (see below), whose sum is σ = 244703452032. Its totient is φ = 55772858880.

The previous prime is 122220999863. The next prime is 122220999947. The reversal of 122220999945 is 549999022221.

It is not a de Polignac number, because 122220999945 - 2⁸ = 122220999689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122220999891 and 122220999900.

It is not an unprimeable number, because it can be changed into a prime (122220999947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7253677 + ... + 7270506.

It is an arithmetic number, because the mean of its divisors is an integer number (5097988584).

Almost surely, 2^122220999945 is an apocalyptic number.

122220999945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122220999945 is an abundant number, since it is smaller than the sum of its proper divisors (122482452087).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122220999945 is a wasteful number, since it uses less digits than its factorization.

122220999945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14524222 (or 14524219 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 122220999945 in words is "one hundred twenty-two billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred forty-five".