13123212021220 has 48 divisors (see below), whose sum is σ = 31513197356928. Its totient is φ = 4496888620800.

The previous prime is 13123212021197. The next prime is 13123212021233. The reversal of 13123212021220 is 2212021232131.

It is a junction number, because it is equal to n+sod(n) for n = 13123212021191 and 13123212021200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25771522 + ... + 26275801.

It is an arithmetic number, because the mean of its divisors is an integer number (656524944936).

Almost surely, 2^{13123212021220} is an apocalyptic number.

13123212021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123212021220 is an abundant number, since it is smaller than the sum of its proper divisors (18389985335708).

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

13123212021220 is a wasteful number, since it uses less digits than its factorization.

13123212021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52049140 (or 52049138 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 13123212021220 its reverse (2212021232131), we get a palindrome (15335233253351).

The spelling of 13123212021220 in words is "thirteen trillion, one hundred twenty-three billion, two hundred twelve million, twenty-one thousand, two hundred twenty".