11420123220 has 72 divisors (see below), whose sum is σ = 37790232480. Its totient is φ = 2768514240.

The previous prime is 11420123191. The next prime is 11420123243. The reversal of 11420123220 is 2232102411.

It is a happy number.

11420123220 is a `hidden beast` number, since 1 + 1 + 420 + 1 + 23 + 220 = 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 = 11420123193 and 11420123202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2881890 + ... + 2885849.

It is an arithmetic number, because the mean of its divisors is an integer number (524864340).

Almost surely, 2^11420123220 is an apocalyptic number.

11420123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11420123220 is an abundant number, since it is smaller than the sum of its proper divisors (26370109260).

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

11420123220 is a wasteful number, since it uses less digits than its factorization.

11420123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767765 (or 5767760 counting only the distinct ones).

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

Adding to 11420123220 its reverse (2232102411), we get a palindrome (13652225631).

The spelling of 11420123220 in words is "eleven billion, four hundred twenty million, one hundred twenty-three thousand, two hundred twenty".