123221020122 has 20 divisors (see below), whose sum is σ = 276106360266. Its totient is φ = 41073673320.

The previous prime is 123221020063. The next prime is 123221020123. The reversal of 123221020122 is 221020122321.

123221020122 is a `hidden beast` number, since 1 + 232 + 210 + 201 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 117339817401 + 5881202721 = 342549^2 + 76689^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123221020095 and 123221020104.

It is not an unprimeable number, because it can be changed into a prime (123221020123) 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 9 ways as a sum of consecutive naturals, for example, 380311629 + ... + 380311952.

Almost surely, 2^123221020122 is an apocalyptic number.

123221020122 is an abundant number, since it is smaller than the sum of its proper divisors (152885340144).

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

123221020122 is an equidigital number, since it uses as much as digits as its factorization.

123221020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760623595 (or 760623586 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 123221020122 its reverse (221020122321), we get a palindrome (344241142443).

The spelling of 123221020122 in words is "one hundred twenty-three billion, two hundred twenty-one million, twenty thousand, one hundred twenty-two".