122220999946 has 4 divisors (see below), whose sum is σ = 183331499922. Its totient is φ = 61110499972.

The previous prime is 122220999863. The next prime is 122220999947. The reversal of 122220999946 is 649999022221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649999022221 = 293 ⋅2218426697.

It can be written as a sum of positive squares in only one way, i.e., 118929109321 + 3291890625 = 344861^2 + 57375^2 .

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 as a sum of consecutive naturals, namely, 30555249985 + ... + 30555249988.

Almost surely, 2^122220999946 is an apocalyptic number.

122220999946 is a deficient number, since it is larger than the sum of its proper divisors (61110499976).

122220999946 is an equidigital number, since it uses as much as digits as its factorization.

122220999946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61110499975.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 122220999946 in words is "one hundred twenty-two billion, two hundred twenty million, nine hundred ninety-nine thousand, nine hundred forty-six".