220632101 has 4 divisors (see below), whose sum is σ = 220663212. Its totient is φ = 220600992.

The previous prime is 220632089. The next prime is 220632109. The reversal of 220632101 is 101236022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 217120225 + 3511876 = 14735^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 220632101 - 2⁶ = 220632037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220632101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220632109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851 + ... + 21023.

It is an arithmetic number, because the mean of its divisors is an integer number (55165803).

Almost surely, 2^220632101 is an apocalyptic number.

It is an amenable number.

220632101 is a deficient number, since it is larger than the sum of its proper divisors (31111).

220632101 is a wasteful number, since it uses less digits than its factorization.

220632101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31110.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 220632101 is about 14853.6898109527. The cubic root of 220632101 is about 604.2586835818.

Adding to 220632101 its reverse (101236022), we get a palindrome (321868123).

The spelling of 220632101 in words is "two hundred twenty million, six hundred thirty-two thousand, one hundred one".