13020001220 has 24 divisors (see below), whose sum is σ = 27346464600. Its totient is φ = 5207150592.

The previous prime is 13020001219. The next prime is 13020001283. The reversal of 13020001220 is 2210002031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1987019776 + 11032981444 = 44576^2 + 105038^2 .

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, 80726 + ... + 180434.

It is an arithmetic number, because the mean of its divisors is an integer number (1139436025).

Almost surely, 2^13020001220 is an apocalyptic number.

13020001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13020001220 is an abundant number, since it is smaller than the sum of its proper divisors (14326463380).

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

13020001220 is a wasteful number, since it uses less digits than its factorization.

13020001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106247 (or 106245 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 13020001220 its reverse (2210002031), we get a palindrome (15230003251).

The spelling of 13020001220 in words is "thirteen billion, twenty million, one thousand, two hundred twenty".