13266211220 has 24 divisors (see below), whose sum is σ = 28506930144. Its totient is φ = 5183077536.

The previous prime is 13266211169. The next prime is 13266211241. The reversal of 13266211220 is 2211266231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13266211220.

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, 7712054 + ... + 7713773.

It is an arithmetic number, because the mean of its divisors is an integer number (1187788756).

Almost surely, 2^13266211220 is an apocalyptic number.

13266211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13266211220 is an abundant number, since it is smaller than the sum of its proper divisors (15240718924).

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

13266211220 is a wasteful number, since it uses less digits than its factorization.

13266211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15425879 (or 15425877 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 13266211220 its reverse (2211266231), we get a palindrome (15477477451).

The spelling of 13266211220 in words is "thirteen billion, two hundred sixty-six million, two hundred eleven thousand, two hundred twenty".