221131112111300 has 18 divisors (see below), whose sum is σ = 479854513281738. Its totient is φ = 88452444844480.

The previous prime is 221131112111291. The next prime is 221131112111317. The reversal of 221131112111300 is 3111211131122.

It can be written as a sum of positive squares in 3 ways, for example, as 69384635105536 + 151746477005764 = 8329744^2 + 12318542^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105655560457 + ... + 1105655560656.

Almost surely, 2^{221131112111300} is an apocalyptic number.

221131112111300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221131112111300 is an abundant number, since it is smaller than the sum of its proper divisors (258723401170438).

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

221131112111300 is a wasteful number, since it uses less digits than its factorization.

221131112111300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211311121127 (or 2211311121120 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 221131112111300 its reverse (3111211131122), we get a palindrome (224242323242422).

The spelling of 221131112111300 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, one hundred twelve million, one hundred eleven thousand, three hundred".