221131122300 has 216 divisors, whose sum is σ = 763479050880. Its totient is φ = 53086838400.

The previous prime is 221131122281. The next prime is 221131122301. The reversal of 221131122300 is 3221131122.

221131122300 is a `hidden beast` number, since 2 + 211 + 31 + 122 + 300 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131122301) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 911271 + ... + 1128129.

Almost surely, 2^221131122300 is an apocalyptic number.

221131122300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221131122300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381739525440).

221131122300 is an abundant number, since it is smaller than the sum of its proper divisors (542347928580).

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

221131122300 is a wasteful number, since it uses less digits than its factorization.

221131122300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216993 (or 216983 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221131122300 its reverse (3221131122), we get a palindrome (224352253422).

The spelling of 221131122300 in words is "two hundred twenty-one billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred".