11312420220 has 72 divisors (see below), whose sum is σ = 35112373296. Its totient is φ = 2946488832.

The previous prime is 11312420191. The next prime is 11312420239. The reversal of 11312420220 is 2202421311.

It is a happy number.

11312420220 is a `hidden beast` number, since 1 + 13 + 12 + 420 + 220 = 666.

11312420220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11312420193 and 11312420202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 723037 + ... + 738516.

Almost surely, 2^11312420220 is an apocalyptic number.

11312420220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312420220 is an abundant number, since it is smaller than the sum of its proper divisors (23799953076).

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

11312420220 is a wasteful number, since it uses less digits than its factorization.

11312420220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461611 (or 1461606 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 11312420220 its reverse (2202421311), we get a palindrome (13514841531).

The spelling of 11312420220 in words is "eleven billion, three hundred twelve million, four hundred twenty thousand, two hundred twenty".