1236231213 has 16 divisors (see below), whose sum is σ = 1902435456. Its totient is φ = 699422400.

The previous prime is 1236231203. The next prime is 1236231233. The reversal of 1236231213 is 3121326321.

It is not a de Polignac number, because 1236231213 - 2¹⁰ = 1236230189 is a prime.

It is a super-2 number, since 2×1236231213² = 3056535223990902738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236231203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289306 + ... + 293547.

It is an arithmetic number, because the mean of its divisors is an integer number (118902216).

Almost surely, 2^1236231213 is an apocalyptic number.

It is an amenable number.

1236231213 is a deficient number, since it is larger than the sum of its proper divisors (666204243).

1236231213 is a wasteful number, since it uses less digits than its factorization.

1236231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582964.

The product of its digits is 1296, while the sum is 24.

The square root of 1236231213 is about 35160.0798207285. The cubic root of 1236231213 is about 1073.2475396514.

Adding to 1236231213 its reverse (3121326321), we get a palindrome (4357557534).

The spelling of 1236231213 in words is "one billion, two hundred thirty-six million, two hundred thirty-one thousand, two hundred thirteen".