221001042 has 32 divisors (see below), whose sum is σ = 446515200. Its totient is φ = 72919440.

The previous prime is 221001031. The next prime is 221001049. The reversal of 221001042 is 240100122.

It is not an unprimeable number, because it can be changed into a prime (221001049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323233 + ... + 323915.

It is an arithmetic number, because the mean of its divisors is an integer number (13953600).

Almost surely, 2^221001042 is an apocalyptic number.

221001042 is an abundant number, since it is smaller than the sum of its proper divisors (225514158).

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

221001042 is a wasteful number, since it uses less digits than its factorization.

221001042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 221001042 is about 14866.1037935298. The cubic root of 221001042 is about 604.5953098069.

Adding to 221001042 its reverse (240100122), we get a palindrome (461101164).

The spelling of 221001042 in words is "two hundred twenty-one million, one thousand, forty-two".