221112424420 has 12 divisors (see below), whose sum is σ = 464336091324. Its totient is φ = 88444969760.

The previous prime is 221112424409. The next prime is 221112424517. The reversal of 221112424420 is 24424211122.

It can be written as a sum of positive squares in 2 ways, for example, as 111486538816 + 109625885604 = 333896^2 + 331098^2 .

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, 5527810591 + ... + 5527810630.

It is an arithmetic number, because the mean of its divisors is an integer number (38694674277).

Almost surely, 2^221112424420 is an apocalyptic number.

221112424420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112424420 is an abundant number, since it is smaller than the sum of its proper divisors (243223666904).

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

221112424420 is a wasteful number, since it uses less digits than its factorization.

221112424420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11055621230 (or 11055621228 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 221112424420 its reverse (24424211122), we get a palindrome (245536635542).

The spelling of 221112424420 in words is "two hundred twenty-one billion, one hundred twelve million, four hundred twenty-four thousand, four hundred twenty".