13123201100020 has 96 divisors (see below), whose sum is σ = 30101939352576. Its totient is φ = 4766063846400.

The previous prime is 13123201099993. The next prime is 13123201100099. The reversal of 13123201100020 is 2000110232131.

It is a super-2 number, since 2×13123201100020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13123201099967 and 13123201100003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 852646525 + ... + 852661915.

It is an arithmetic number, because the mean of its divisors is an integer number (313561868256).

Almost surely, 2^{13123201100020} is an apocalyptic number.

13123201100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123201100020 is an abundant number, since it is smaller than the sum of its proper divisors (16978738252556).

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

13123201100020 is a wasteful number, since it uses less digits than its factorization.

13123201100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20041 (or 20039 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13123201100020 its reverse (2000110232131), we get a palindrome (15123311332151).

The spelling of 13123201100020 in words is "thirteen trillion, one hundred twenty-three billion, two hundred one million, one hundred thousand, twenty".