133221135401 has 2 divisors, whose sum is σ = 133221135402. Its totient is φ = 133221135400.

The previous prime is 133221135373. The next prime is 133221135419. The reversal of 133221135401 is 104531122331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68826997801 + 64394137600 = 262349^2 + 253760^2 .

It is a cyclic number.

It is not a de Polignac number, because 133221135401 - 2²² = 133216941097 is a prime.

It is not a weakly prime, because it can be changed into another prime (133221035401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66610567700 + 66610567701.

It is an arithmetic number, because the mean of its divisors is an integer number (66610567701).

Almost surely, 2^133221135401 is an apocalyptic number.

It is an amenable number.

133221135401 is a deficient number, since it is larger than the sum of its proper divisors (1).

133221135401 is an equidigital number, since it uses as much as digits as its factorization.

133221135401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 133221135401 its reverse (104531122331), we get a palindrome (237752257732).

The spelling of 133221135401 in words is "one hundred thirty-three billion, two hundred twenty-one million, one hundred thirty-five thousand, four hundred one".