2121132223 has 4 divisors (see below), whose sum is σ = 2424151120. Its totient is φ = 1818113328.

The previous prime is 2121132217. The next prime is 2121132227. The reversal of 2121132223 is 3222311212.

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 2121132223 - 2²¹ = 2119035071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121132223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121132227) 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, 151509438 + ... + 151509451.

It is an arithmetic number, because the mean of its divisors is an integer number (606037780).

Almost surely, 2^2121132223 is an apocalyptic number.

2121132223 is a deficient number, since it is larger than the sum of its proper divisors (303018897).

2121132223 is an equidigital number, since it uses as much as digits as its factorization.

2121132223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303018896.

The product of its digits is 288, while the sum is 19.

The square root of 2121132223 is about 46055.7512478083. The cubic root of 2121132223 is about 1284.8603103311.

Adding to 2121132223 its reverse (3222311212), we get a palindrome (5343443435).

The spelling of 2121132223 in words is "two billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred twenty-three".