1722121333 has 2 divisors, whose sum is σ = 1722121334. Its totient is φ = 1722121332.

The previous prime is 1722121249. The next prime is 1722121337. The reversal of 1722121333 is 3331212271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1581414289 + 140707044 = 39767^2 + 11862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722121333 - 2⁹ = 1722120821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1722121298 and 1722121307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722121337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861060666 + 861060667.

It is an arithmetic number, because the mean of its divisors is an integer number (861060667).

Almost surely, 2^1722121333 is an apocalyptic number.

It is an amenable number.

1722121333 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722121333 is an equidigital number, since it uses as much as digits as its factorization.

1722121333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 25.

The square root of 1722121333 is about 41498.4497662262. The cubic root of 1722121333 is about 1198.6376513775.

The spelling of 1722121333 in words is "one billion, seven hundred twenty-two million, one hundred twenty-one thousand, three hundred thirty-three".