11111210420 has 12 divisors (see below), whose sum is σ = 23333541924. Its totient is φ = 4444484160.

The previous prime is 11111210413. The next prime is 11111210441. The reversal of 11111210420 is 2401211111.

It can be written as a sum of positive squares in 2 ways, for example, as 7164606736 + 3946603684 = 84644^2 + 62822^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11111210395 and 11111210404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277780241 + ... + 277780280.

It is an arithmetic number, because the mean of its divisors is an integer number (1944461827).

Almost surely, 2^11111210420 is an apocalyptic number.

11111210420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111210420 is an abundant number, since it is smaller than the sum of its proper divisors (12222331504).

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

11111210420 is a wasteful number, since it uses less digits than its factorization.

11111210420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555560530 (or 555560528 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11111210420 its reverse (2401211111), we get a palindrome (13512421531).

The spelling of 11111210420 in words is "eleven billion, one hundred eleven million, two hundred ten thousand, four hundred twenty".