11312312201220 has 48 divisors (see below), whose sum is σ = 31675695428160. Its totient is φ = 3016500276096.

The previous prime is 11312312201161. The next prime is 11312312201227. The reversal of 11312312201220 is 2210221321311.

It is not an unprimeable number, because it can be changed into a prime (11312312201227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2059962 + ... + 5183441.

It is an arithmetic number, because the mean of its divisors is an integer number (659910321420).

Almost surely, 2^{11312312201220} is an apocalyptic number.

11312312201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312312201220 is an abundant number, since it is smaller than the sum of its proper divisors (20363383226940).

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

11312312201220 is a wasteful number, since it uses less digits than its factorization.

11312312201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269444 (or 7269442 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11312312201220 its reverse (2210221321311), we get a palindrome (13522533522531).

The spelling of 11312312201220 in words is "eleven trillion, three hundred twelve billion, three hundred twelve million, two hundred one thousand, two hundred twenty".