33121602001 has 2 divisors, whose sum is σ = 33121602002. Its totient is φ = 33121602000.

The previous prime is 33121601999. The next prime is 33121602013. The reversal of 33121602001 is 10020612133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19656320401 + 13465281600 = 140201^2 + 116040^2 .

It is a cyclic number.

It is not a de Polignac number, because 33121602001 - 2¹ = 33121601999 is a prime.

It is a super-2 number, since 2×33121602001² (a number of 22 digits) contains 22 as substring.

Together with 33121601999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33121602001.

It is not a weakly prime, because it can be changed into another prime (33121602071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560801000 + 16560801001.

It is an arithmetic number, because the mean of its divisors is an integer number (16560801001).

Almost surely, 2^33121602001 is an apocalyptic number.

It is an amenable number.

33121602001 is a deficient number, since it is larger than the sum of its proper divisors (1).

33121602001 is an equidigital number, since it uses as much as digits as its factorization.

33121602001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The spelling of 33121602001 in words is "thirty-three billion, one hundred twenty-one million, six hundred two thousand, one".