210201221023 has 4 divisors (see below), whose sum is σ = 211301751168. Its totient is φ = 209100690880.

The previous prime is 210201221003. The next prime is 210201221119. The reversal of 210201221023 is 320122102012.

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 210201221023 - 2⁵ = 210201220991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210201220988 and 210201221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201221003) 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, 550264786 + ... + 550265167.

It is an arithmetic number, because the mean of its divisors is an integer number (52825437792).

Almost surely, 2^210201221023 is an apocalyptic number.

210201221023 is a deficient number, since it is larger than the sum of its proper divisors (1100530145).

210201221023 is a wasteful number, since it uses less digits than its factorization.

210201221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100530144.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210201221023 its reverse (320122102012), we get a palindrome (530323323035).

The spelling of 210201221023 in words is "two hundred ten billion, two hundred one million, two hundred twenty-one thousand, twenty-three".