221012132 has 24 divisors (see below), whose sum is σ = 436484160. Its totient is φ = 96995360.

The previous prime is 221012119. The next prime is 221012149. The reversal of 221012132 is 231210122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85328 + ... + 87879.

It is an arithmetic number, because the mean of its divisors is an integer number (18186840).

Almost surely, 2^221012132 is an apocalyptic number.

221012132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221012132 is a deficient number, since it is larger than the sum of its proper divisors (215472028).

221012132 is a wasteful number, since it uses less digits than its factorization.

221012132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173251 (or 173249 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221012132 is about 14866.4767850355. The cubic root of 221012132 is about 604.6054226549.

Adding to 221012132 its reverse (231210122), we get a palindrome (452222254).

The spelling of 221012132 in words is "two hundred twenty-one million, twelve thousand, one hundred thirty-two".