104123211220 has 96 divisors (see below), whose sum is σ = 260903462400. Its totient is φ = 34128551424.

The previous prime is 104123211097. The next prime is 104123211251. The reversal of 104123211220 is 22112321401.

It is a super-2 number, since 2×104123211220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6654366 + ... + 6669994.

It is an arithmetic number, because the mean of its divisors is an integer number (2717744400).

Almost surely, 2^104123211220 is an apocalyptic number.

104123211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 104123211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130451731200).

104123211220 is an abundant number, since it is smaller than the sum of its proper divisors (156780251180).

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

104123211220 is a wasteful number, since it uses less digits than its factorization.

104123211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17737 (or 17735 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 104123211220 its reverse (22112321401), we get a palindrome (126235532621).

The spelling of 104123211220 in words is "one hundred four billion, one hundred twenty-three million, two hundred eleven thousand, two hundred twenty".