20012122033 has 6 divisors (see below), whose sum is σ = 21258552086. Its totient is φ = 18834938112.

The previous prime is 20012122007. The next prime is 20012122043. The reversal of 20012122033 is 33022121002.

It can be written as a sum of positive squares in 3 ways, for example, as 15411484449 + 4600637584 = 124143^2 + 67828^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20012122033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012121998 and 20012122016.

It is not an unprimeable number, because it can be changed into a prime (20012122043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34622760 + ... + 34623337.

Almost surely, 2^20012122033 is an apocalyptic number.

It is an amenable number.

20012122033 is a deficient number, since it is larger than the sum of its proper divisors (1246430053).

20012122033 is an equidigital number, since it uses as much as digits as its factorization.

20012122033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69246131 (or 69246114 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20012122033 its reverse (33022121002), we get a palindrome (53034243035).

The spelling of 20012122033 in words is "twenty billion, twelve million, one hundred twenty-two thousand, thirty-three".