133121311 has 2 divisors, whose sum is σ = 133121312. Its totient is φ = 133121310.

The previous prime is 133121299. The next prime is 133121321. The reversal of 133121311 is 113121331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133121311 - 2¹³ = 133113119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133121321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66560655 + 66560656.

It is an arithmetic number, because the mean of its divisors is an integer number (66560656).

Almost surely, 2^133121311 is an apocalyptic number.

133121311 is a deficient number, since it is larger than the sum of its proper divisors (1).

133121311 is an equidigital number, since it uses as much as digits as its factorization.

133121311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 16.

The square root of 133121311 is about 11537.8208947790. The cubic root of 133121311 is about 510.6020200778.

Adding to 133121311 its reverse (113121331), we get a palindrome (246242642).

The spelling of 133121311 in words is "one hundred thirty-three million, one hundred twenty-one thousand, three hundred eleven".