20041033121 has 4 divisors (see below), whose sum is σ = 20041429572. Its totient is φ = 20040636672.

The previous prime is 20041033063. The next prime is 20041033127. The reversal of 20041033121 is 12133014002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10600967521 + 9440065600 = 102961^2 + 97160^2 .

It is a cyclic number.

It is not a de Polignac number, because 20041033121 - 2⁶ = 20041033057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20041033121.

It is not an unprimeable number, because it can be changed into a prime (20041033127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109016 + ... + 227961.

It is an arithmetic number, because the mean of its divisors is an integer number (5010357393).

Almost surely, 2^20041033121 is an apocalyptic number.

It is an amenable number.

20041033121 is a deficient number, since it is larger than the sum of its proper divisors (396451).

20041033121 is an equidigital number, since it uses as much as digits as its factorization.

20041033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396450.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20041033121 its reverse (12133014002), we get a palindrome (32174047123).

The spelling of 20041033121 in words is "twenty billion, forty-one million, thirty-three thousand, one hundred twenty-one".