20203121110 has 32 divisors (see below), whose sum is σ = 38021503680. Its totient is φ = 7714658688.

The previous prime is 20203121101. The next prime is 20203121111. The reversal of 20203121110 is 1112130202.

It is a super-2 number, since 2×20203121110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30784 + ... + 203356.

It is an arithmetic number, because the mean of its divisors is an integer number (1188171990).

Almost surely, 2^20203121110 is an apocalyptic number.

20203121110 is a deficient number, since it is larger than the sum of its proper divisors (17818382570).

20203121110 is a wasteful number, since it uses less digits than its factorization.

20203121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173112.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20203121110 its reverse (1112130202), we get a palindrome (21315251312).

The spelling of 20203121110 in words is "twenty billion, two hundred three million, one hundred twenty-one thousand, one hundred ten".