1213532311 has 2 divisors, whose sum is σ = 1213532312. Its totient is φ = 1213532310.

The previous prime is 1213532273. The next prime is 1213532323. The reversal of 1213532311 is 1132353121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1132353121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213532311 - 2⁷ = 1213532183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213533311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606766155 + 606766156.

It is an arithmetic number, because the mean of its divisors is an integer number (606766156).

Almost surely, 2^1213532311 is an apocalyptic number.

1213532311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213532311 is an equidigital number, since it uses as much as digits as its factorization.

1213532311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 1213532311 is about 34835.7906613299. The cubic root of 1213532311 is about 1066.6381545873.

Adding to 1213532311 its reverse (1132353121), we get a palindrome (2345885432).

The spelling of 1213532311 in words is "one billion, two hundred thirteen million, five hundred thirty-two thousand, three hundred eleven".