13121213110220 has 24 divisors (see below), whose sum is σ = 27723593842224. Its totient is φ = 5216285946816.

The previous prime is 13121213110189. The next prime is 13121213110237. The reversal of 13121213110220 is 2201131212131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13121213110192 and 13121213110201.

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, 2012452739 + ... + 2012459258.

It is an arithmetic number, because the mean of its divisors is an integer number (1155149743426).

Almost surely, 2^{13121213110220} is an apocalyptic number.

13121213110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121213110220 is an abundant number, since it is smaller than the sum of its proper divisors (14602380732004).

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

13121213110220 is a wasteful number, since it uses less digits than its factorization.

13121213110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024912169 (or 4024912167 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 13121213110220 its reverse (2201131212131), we get a palindrome (15322344322351).

The spelling of 13121213110220 in words is "thirteen trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred ten thousand, two hundred twenty".