33321070021 has 2 divisors, whose sum is σ = 33321070022. Its totient is φ = 33321070020.

The previous prime is 33321069973. The next prime is 33321070043. The reversal of 33321070021 is 12007012333.

It is a happy number.

It is an a-pointer prime, because the next prime (33321070043) can be obtained adding 33321070021 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17905116100 + 15415953921 = 133810^2 + 124161^2 .

It is a cyclic number.

It is not a de Polignac number, because 33321070021 - 2⁷ = 33321069893 is a prime.

It is a super-2 number, since 2×33321070021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33321069974 and 33321070001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33321070061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16660535010 + 16660535011.

It is an arithmetic number, because the mean of its divisors is an integer number (16660535011).

Almost surely, 2^33321070021 is an apocalyptic number.

It is an amenable number.

33321070021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33321070021 is an equidigital number, since it uses as much as digits as its factorization.

33321070021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

Adding to 33321070021 its reverse (12007012333), we get a palindrome (45328082354).

The spelling of 33321070021 in words is "thirty-three billion, three hundred twenty-one million, seventy thousand, twenty-one".