20203121103321 has 16 divisors (see below), whose sum is σ = 29013855687936. Its totient is φ = 12430870238976.

The previous prime is 20203121103317. The next prime is 20203121103323. The reversal of 20203121103321 is 12330112130202.

It is not a de Polignac number, because 20203121103321 - 2² = 20203121103317 is a prime.

It is a super-2 number, since 2×20203121103321² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20203121103323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37639905 + ... + 38172878.

It is an arithmetic number, because the mean of its divisors is an integer number (1813365980496).

Almost surely, 2^{20203121103321} is an apocalyptic number.

It is an amenable number.

20203121103321 is a deficient number, since it is larger than the sum of its proper divisors (8810734584615).

20203121103321 is a wasteful number, since it uses less digits than its factorization.

20203121103321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75819632.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20203121103321 its reverse (12330112130202), we get a palindrome (32533233233523).

The spelling of 20203121103321 in words is "twenty trillion, two hundred three billion, one hundred twenty-one million, one hundred three thousand, three hundred twenty-one".