221130212323 has 4 divisors (see below), whose sum is σ = 221640906088. Its totient is φ = 220619518560.

The previous prime is 221130212309. The next prime is 221130212327. The reversal of 221130212323 is 323212031122.

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 221130212323 - 2¹³ = 221130204131 is a prime.

It is a super-2 number, since 2×221130212323² (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 = 221130212294 and 221130212303.

It is not an unprimeable number, because it can be changed into a prime (221130212327) 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, 255346233 + ... + 255347098.

It is an arithmetic number, because the mean of its divisors is an integer number (55410226522).

Almost surely, 2^221130212323 is an apocalyptic number.

221130212323 is a deficient number, since it is larger than the sum of its proper divisors (510693765).

221130212323 is an equidigital number, since it uses as much as digits as its factorization.

221130212323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510693764.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221130212323 its reverse (323212031122), we get a palindrome (544342243445).

The spelling of 221130212323 in words is "two hundred twenty-one billion, one hundred thirty million, two hundred twelve thousand, three hundred twenty-three".