221130312023 has 4 divisors (see below), whose sum is σ = 221622807600. Its totient is φ = 220637816448.

The previous prime is 221130311977. The next prime is 221130312043. The reversal of 221130312023 is 320213031122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320213031122 = 2 ⋅160106515561.

It is a cyclic number.

It is not a de Polignac number, because 221130312023 - 2⁸ = 221130311767 is a prime.

It is a super-2 number, since 2×221130312023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221130311986 and 221130312004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221130312043) 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, 246247115 + ... + 246248012.

It is an arithmetic number, because the mean of its divisors is an integer number (55405701900).

Almost surely, 2^221130312023 is an apocalyptic number.

221130312023 is a deficient number, since it is larger than the sum of its proper divisors (492495577).

221130312023 is an equidigital number, since it uses as much as digits as its factorization.

221130312023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492495576.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221130312023 its reverse (320213031122), we get a palindrome (541343343145).

The spelling of 221130312023 in words is "two hundred twenty-one billion, one hundred thirty million, three hundred twelve thousand, twenty-three".