221100432140 has 48 divisors (see below), whose sum is σ = 533708384832. Its totient is φ = 75367670016.

The previous prime is 221100432127. The next prime is 221100432167. The reversal of 221100432140 is 41234001122.

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 15 ways as a sum of consecutive naturals, for example, 4540199 + ... + 4588638.

It is an arithmetic number, because the mean of its divisors is an integer number (11118924684).

Almost surely, 2^221100432140 is an apocalyptic number.

221100432140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100432140 is an abundant number, since it is smaller than the sum of its proper divisors (312607952692).

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

221100432140 is a wasteful number, since it uses less digits than its factorization.

221100432140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9129026 (or 9129024 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221100432140 its reverse (41234001122), we get a palindrome (262334433262).

The spelling of 221100432140 in words is "two hundred twenty-one billion, one hundred million, four hundred thirty-two thousand, one hundred forty".