13121213112220 has 24 divisors (see below), whose sum is σ = 28021573767600. Its totient is φ = 5159527867392.

The previous prime is 13121213112209. The next prime is 13121213112251. The reversal of 13121213112220 is 2221131212131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13121213112191 and 13121213112200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5559834885 + ... + 5559837244.

It is an arithmetic number, because the mean of its divisors is an integer number (1167565573650).

Almost surely, 2^{13121213112220} is an apocalyptic number.

13121213112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121213112220 is an abundant number, since it is smaller than the sum of its proper divisors (14900360655380).

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

13121213112220 is a wasteful number, since it uses less digits than its factorization.

13121213112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11119672197 (or 11119672195 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 13121213112220 its reverse (2221131212131), we get a palindrome (15342344324351).

The spelling of 13121213112220 in words is "thirteen trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred twelve thousand, two hundred twenty".