13021123100 has 36 divisors (see below), whose sum is σ = 28653822288. Its totient is φ = 5135088000.

The previous prime is 13021123081. The next prime is 13021123117. The reversal of 13021123100 is 132112031.

It is a super-2 number, since 2×13021123100² (a number of 21 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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 909881 + ... + 924080.

It is an arithmetic number, because the mean of its divisors is an integer number (795939508).

Almost surely, 2^13021123100 is an apocalyptic number.

13021123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021123100 is an abundant number, since it is smaller than the sum of its proper divisors (15632699188).

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

13021123100 is a wasteful number, since it uses less digits than its factorization.

13021123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834046 (or 1834039 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 13021123100 its reverse (132112031), we get a palindrome (13153235131).

The spelling of 13021123100 in words is "thirteen billion, twenty-one million, one hundred twenty-three thousand, one hundred".