1721227133 has 2 divisors, whose sum is σ = 1721227134. Its totient is φ = 1721227132.

The previous prime is 1721227127. The next prime is 1721227201. The reversal of 1721227133 is 3317221271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1578711289 + 142515844 = 39733^2 + 11938^2 .

It is a cyclic number.

It is not a de Polignac number, because 1721227133 - 2¹⁴ = 1721210749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1721227096 and 1721227105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1721227933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860613566 + 860613567.

It is an arithmetic number, because the mean of its divisors is an integer number (860613567).

Almost surely, 2^1721227133 is an apocalyptic number.

It is an amenable number.

1721227133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1721227133 is an equidigital number, since it uses as much as digits as its factorization.

1721227133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 1721227133 is about 41487.6744708594. The cubic root of 1721227133 is about 1198.4301539279.

The spelling of 1721227133 in words is "one billion, seven hundred twenty-one million, two hundred twenty-seven thousand, one hundred thirty-three".