221123001 has 8 divisors (see below), whose sum is σ = 321633504. Its totient is φ = 134013920.

The previous prime is 221122991. The next prime is 221123011. The reversal of 221123001 is 100321122.

221123001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221122991) and next prime (221123011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221123001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221123011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350316 + ... + 3350381.

It is an arithmetic number, because the mean of its divisors is an integer number (40204188).

Almost surely, 2^221123001 is an apocalyptic number.

It is an amenable number.

221123001 is a deficient number, since it is larger than the sum of its proper divisors (100510503).

221123001 is a wasteful number, since it uses less digits than its factorization.

221123001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700711.

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

The square root of 221123001 is about 14870.2051431714. The cubic root of 221123001 is about 604.7065042749.

Adding to 221123001 its reverse (100321122), we get a palindrome (321444123).

The spelling of 221123001 in words is "two hundred twenty-one million, one hundred twenty-three thousand, one".