1233254221 has 4 divisors (see below), whose sum is σ = 1247111100. Its totient is φ = 1219397344.

The previous prime is 1233254213. The next prime is 1233254279. The reversal of 1233254221 is 1224523321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 511257321 + 721996900 = 22611^2 + 26870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233254221 - 2³ = 1233254213 is a prime.

It is a super-2 number, since 2×1233254221² = 3041831947228633682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233204221) 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, 6928306 + ... + 6928483.

It is an arithmetic number, because the mean of its divisors is an integer number (311777775).

Almost surely, 2^1233254221 is an apocalyptic number.

It is an amenable number.

1233254221 is a deficient number, since it is larger than the sum of its proper divisors (13856879).

1233254221 is an equidigital number, since it uses as much as digits as its factorization.

1233254221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13856878.

The product of its digits is 2880, while the sum is 25.

The square root of 1233254221 is about 35117.7194732232. The cubic root of 1233254221 is about 1072.3853445568.

Adding to 1233254221 its reverse (1224523321), we get a palindrome (2457777542).

The spelling of 1233254221 in words is "one billion, two hundred thirty-three million, two hundred fifty-four thousand, two hundred twenty-one".