221143101 has 4 divisors (see below), whose sum is σ = 294857472. Its totient is φ = 147428732.

The previous prime is 221143099. The next prime is 221143127. The reversal of 221143101 is 101341122.

221143101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221143101 - 2¹ = 221143099 is a prime.

It is a super-2 number, since 2×221143101² = 97808542239792402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221143141) 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, 36857181 + ... + 36857186.

It is an arithmetic number, because the mean of its divisors is an integer number (73714368).

Almost surely, 2^221143101 is an apocalyptic number.

It is an amenable number.

221143101 is a deficient number, since it is larger than the sum of its proper divisors (73714371).

221143101 is an equidigital number, since it uses as much as digits as its factorization.

221143101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73714370.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 221143101 is about 14870.8809759207. The cubic root of 221143101 is about 604.7248262532.

Adding to 221143101 its reverse (101341122), we get a palindrome (322484223).

The spelling of 221143101 in words is "two hundred twenty-one million, one hundred forty-three thousand, one hundred one".