1211320233 has 12 divisors (see below), whose sum is σ = 1750065408. Its totient is φ = 807371160.

The previous prime is 1211320217. The next prime is 1211320241. The reversal of 1211320233 is 3320231121.

It is not a de Polignac number, because 1211320233 - 2⁴ = 1211320217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211320283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39616 + ... + 63182.

It is an arithmetic number, because the mean of its divisors is an integer number (145838784).

Almost surely, 2^1211320233 is an apocalyptic number.

It is an amenable number.

1211320233 is a deficient number, since it is larger than the sum of its proper divisors (538745175).

1211320233 is a wasteful number, since it uses less digits than its factorization.

1211320233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29284 (or 29281 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1211320233 is about 34804.0261033117. The cubic root of 1211320233 is about 1065.9896560168.

Adding to 1211320233 its reverse (3320231121), we get a palindrome (4531551354).

The spelling of 1211320233 in words is "one billion, two hundred eleven million, three hundred twenty thousand, two hundred thirty-three".