133026165721 has 2 divisors, whose sum is σ = 133026165722. Its totient is φ = 133026165720.

The previous prime is 133026165683. The next prime is 133026165733. The reversal of 133026165721 is 127561620331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72488023696 + 60538142025 = 269236^2 + 246045^2 .

It is a cyclic number.

It is not a de Polignac number, because 133026165721 - 2¹⁷ = 133026034649 is a prime.

It is not a weakly prime, because it can be changed into another prime (133026165221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66513082860 + 66513082861.

It is an arithmetic number, because the mean of its divisors is an integer number (66513082861).

Almost surely, 2^133026165721 is an apocalyptic number.

It is an amenable number.

133026165721 is a deficient number, since it is larger than the sum of its proper divisors (1).

133026165721 is an equidigital number, since it uses as much as digits as its factorization.

133026165721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 133026165721 in words is "one hundred thirty-three billion, twenty-six million, one hundred sixty-five thousand, seven hundred twenty-one".