33012112121 has 2 divisors, whose sum is σ = 33012112122. Its totient is φ = 33012112120.

The previous prime is 33012112019. The next prime is 33012112151. The reversal of 33012112121 is 12121121033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32991636496 + 20475625 = 181636^2 + 4525^2 .

It is a cyclic number.

It is not a de Polignac number, because 33012112121 - 2¹⁸ = 33011849977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33012112121.

It is not a weakly prime, because it can be changed into another prime (33012112151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16506056060 + 16506056061.

It is an arithmetic number, because the mean of its divisors is an integer number (16506056061).

Almost surely, 2^33012112121 is an apocalyptic number.

It is an amenable number.

33012112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33012112121 is an equidigital number, since it uses as much as digits as its factorization.

33012112121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 33012112121 its reverse (12121121033), we get a palindrome (45133233154).

The spelling of 33012112121 in words is "thirty-three billion, twelve million, one hundred twelve thousand, one hundred twenty-one".