221001030023 has 4 divisors (see below), whose sum is σ = 221170901448. Its totient is φ = 220831158600.

The previous prime is 221001029989. The next prime is 221001030043. The reversal of 221001030023 is 320030100122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221001030023 - 2¹⁸ = 221000767879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001030043) 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, 84933761 + ... + 84936362.

It is an arithmetic number, because the mean of its divisors is an integer number (55292725362).

Almost surely, 2^221001030023 is an apocalyptic number.

221001030023 is a deficient number, since it is larger than the sum of its proper divisors (169871425).

221001030023 is a wasteful number, since it uses less digits than its factorization.

221001030023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169871424.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 221001030023 its reverse (320030100122), we get a palindrome (541031130145).

The spelling of 221001030023 in words is "two hundred twenty-one billion, one million, thirty thousand, twenty-three".