221112030100 has 36 divisors (see below), whose sum is σ = 516721808764. Its totient is φ = 81641364480.

The previous prime is 221112030079. The next prime is 221112030133. The reversal of 221112030100 is 1030211122.

It can be written as a sum of positive squares in 6 ways, for example, as 448846596 + 220663183504 = 21186^2 + 469748^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85041789 + ... + 85044388.

Almost surely, 2^221112030100 is an apocalyptic number.

221112030100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221112030100 is an abundant number, since it is smaller than the sum of its proper divisors (295609778664).

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

221112030100 is a wasteful number, since it uses less digits than its factorization.

221112030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170086204 (or 170086197 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 221112030100 its reverse (1030211122), we get a palindrome (222142241222).

The spelling of 221112030100 in words is "two hundred twenty-one billion, one hundred twelve million, thirty thousand, one hundred".