221032101 has 32 divisors (see below), whose sum is σ = 308810880. Its totient is φ = 140534784.

The previous prime is 221032087. The next prime is 221032103. The reversal of 221032101 is 101230122.

It is not a de Polignac number, because 221032101 - 2⁵ = 221032069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221032103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1590090 + ... + 1590228.

It is an arithmetic number, because the mean of its divisors is an integer number (9650340).

Almost surely, 2^221032101 is an apocalyptic number.

It is an amenable number.

221032101 is a deficient number, since it is larger than the sum of its proper divisors (87778779).

221032101 is a wasteful number, since it uses less digits than its factorization.

221032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221032101 is about 14867.1483815828. The cubic root of 221032101 is about 604.6236313115.

Adding to 221032101 its reverse (101230122), we get a palindrome (322262223).

The spelling of 221032101 in words is "two hundred twenty-one million, thirty-two thousand, one hundred one".