11312212220 has 24 divisors (see below), whose sum is σ = 23760795408. Its totient is φ = 4523904000.

The previous prime is 11312212217. The next prime is 11312212259. The reversal of 11312212220 is 2221221311.

It is a super-2 number, since 2×11312212220² (a number of 21 digits) contains 22 as substring.

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, 37115 + ... + 154925.

It is an arithmetic number, because the mean of its divisors is an integer number (990033142).

Almost surely, 2^11312212220 is an apocalyptic number.

11312212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312212220 is an abundant number, since it is smaller than the sum of its proper divisors (12448583188).

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

11312212220 is a wasteful number, since it uses less digits than its factorization.

11312212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122621 (or 122619 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11312212220 its reverse (2221221311), we get a palindrome (13533433531).

Subtracting from 11312212220 its reverse (2221221311), we obtain a palindrome (9090990909).

The spelling of 11312212220 in words is "eleven billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty".