123411220220 has 48 divisors (see below), whose sum is σ = 273054260640. Its totient is φ = 46723412736.

The previous prime is 123411220187. The next prime is 123411220259. The reversal of 123411220220 is 22022114321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123411220192 and 123411220201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266774 + ... + 563906.

It is an arithmetic number, because the mean of its divisors is an integer number (5688630430).

Almost surely, 2^123411220220 is an apocalyptic number.

123411220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123411220220 is an abundant number, since it is smaller than the sum of its proper divisors (149643040420).

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

123411220220 is a wasteful number, since it uses less digits than its factorization.

123411220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298254 (or 298252 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123411220220 its reverse (22022114321), we get a palindrome (145433334541).

The spelling of 123411220220 in words is "one hundred twenty-three billion, four hundred eleven million, two hundred twenty thousand, two hundred twenty".