11312220420 has 72 divisors (see below), whose sum is σ = 34330208640. Its totient is φ = 3015144000.

The previous prime is 11312220407. The next prime is 11312220421. The reversal of 11312220420 is 2402221311.

It is a happy number.

11312220420 is a `hidden beast` number, since 1 + 13 + 12 + 220 + 420 = 666.

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 = 11312220393 and 11312220402.

It is not an unprimeable number, because it can be changed into a prime (11312220421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391221 + ... + 419139.

Almost surely, 2^11312220420 is an apocalyptic number.

11312220420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312220420 is an abundant number, since it is smaller than the sum of its proper divisors (23017988220).

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

11312220420 is a wasteful number, since it uses less digits than its factorization.

11312220420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30185 (or 30180 counting only the distinct ones).

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

Adding to 11312220420 its reverse (2402221311), we get a palindrome (13714441731).

The spelling of 11312220420 in words is "eleven billion, three hundred twelve million, two hundred twenty thousand, four hundred twenty".