33432081721 has 2 divisors, whose sum is σ = 33432081722. Its totient is φ = 33432081720.

The previous prime is 33432081701. The next prime is 33432081737. The reversal of 33432081721 is 12718023433.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20553236496 + 12878845225 = 143364^2 + 113485^2 .

It is a cyclic number.

It is not a de Polignac number, because 33432081721 - 2¹⁹ = 33431557433 is a prime.

It is a super-2 number, since 2×33432081721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33432081701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16716040860 + 16716040861.

It is an arithmetic number, because the mean of its divisors is an integer number (16716040861).

Almost surely, 2^33432081721 is an apocalyptic number.

It is an amenable number.

33432081721 is a deficient number, since it is larger than the sum of its proper divisors (1).

33432081721 is an equidigital number, since it uses as much as digits as its factorization.

33432081721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 33432081721 in words is "thirty-three billion, four hundred thirty-two million, eighty-one thousand, seven hundred twenty-one".