123221002130 has 32 divisors (see below), whose sum is σ = 222383844144. Its totient is φ = 49158337536.

The previous prime is 123221002123. The next prime is 123221002133. The reversal of 123221002130 is 31200122321.

It can be written as a sum of positive squares in 8 ways, for example, as 84601284769 + 38619717361 = 290863^2 + 196519^2 .

It is a super-3 number, since 3×123221002130³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123221002099 and 123221002108.

It is not an unprimeable number, because it can be changed into a prime (123221002133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6363944 + ... + 6383276.

Almost surely, 2^123221002130 is an apocalyptic number.

123221002130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123221002130 is a deficient number, since it is larger than the sum of its proper divisors (99162842014).

123221002130 is a wasteful number, since it uses less digits than its factorization.

123221002130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20990.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 123221002130 its reverse (31200122321), we get a palindrome (154421124451).

The spelling of 123221002130 in words is "one hundred twenty-three billion, two hundred twenty-one million, two thousand, one hundred thirty".