11220312012 has 96 divisors (see below), whose sum is σ = 33093430272. Its totient is φ = 2879214336.

The previous prime is 11220312011. The next prime is 11220312013. The reversal of 11220312012 is 21021302211.

It is an interprime number because it is at equal distance from previous prime (11220312011) and next prime (11220312013).

It is a junction number, because it is equal to n+sod(n) for n = 11220311982 and 11220312000.

It is not an unprimeable number, because it can be changed into a prime (11220312011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98448 + ... + 179255.

It is an arithmetic number, because the mean of its divisors is an integer number (344723232).

Almost surely, 2^11220312012 is an apocalyptic number.

11220312012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11220312012 is an abundant number, since it is smaller than the sum of its proper divisors (21873118260).

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

11220312012 is a wasteful number, since it uses less digits than its factorization.

11220312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277767 (or 277765 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11220312012 its reverse (21021302211), we get a palindrome (32241614223).

The spelling of 11220312012 in words is "eleven billion, two hundred twenty million, three hundred twelve thousand, twelve".