20010121033 has 12 divisors (see below), whose sum is σ = 23280342420. Its totient is φ = 17149128192.

The previous prime is 20010121013. The next prime is 20010121063. The reversal of 20010121033 is 33012101002.

It can be written as a sum of positive squares in 2 ways, for example, as 12537728784 + 7472392249 = 111972^2 + 86443^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20010121033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010121013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384853 + ... + 433741.

It is an arithmetic number, because the mean of its divisors is an integer number (1940028535).

Almost surely, 2^20010121033 is an apocalyptic number.

It is an amenable number.

20010121033 is a deficient number, since it is larger than the sum of its proper divisors (3270221387).

20010121033 is an equidigital number, since it uses as much as digits as its factorization.

20010121033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57256 (or 57249 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20010121033 its reverse (33012101002), we get a palindrome (53022222035).

The spelling of 20010121033 in words is "twenty billion, ten million, one hundred twenty-one thousand, thirty-three".