133111228421 has 2 divisors, whose sum is σ = 133111228422. Its totient is φ = 133111228420.

The previous prime is 133111228381. The next prime is 133111228429. The reversal of 133111228421 is 124822111331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99039237025 + 34071991396 = 314705^2 + 184586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133111228421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133111228429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66555614210 + 66555614211.

It is an arithmetic number, because the mean of its divisors is an integer number (66555614211).

Almost surely, 2^133111228421 is an apocalyptic number.

It is an amenable number.

133111228421 is a deficient number, since it is larger than the sum of its proper divisors (1).

133111228421 is an equidigital number, since it uses as much as digits as its factorization.

133111228421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

Adding to 133111228421 its reverse (124822111331), we get a palindrome (257933339752).

The spelling of 133111228421 in words is "one hundred thirty-three billion, one hundred eleven million, two hundred twenty-eight thousand, four hundred twenty-one".