20103221331 has 8 divisors (see below), whose sum is σ = 29782550160. Its totient is φ = 13402147536.

The previous prime is 20103221291. The next prime is 20103221363. The reversal of 20103221331 is 13312230102.

20103221331 is a `hidden beast` number, since 2 + 0 + 10 + 322 + 1 + 331 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20103221331 is a prime.

It is a super-2 number, since 2×20103221331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20103221431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372281850 + ... + 372281903.

It is an arithmetic number, because the mean of its divisors is an integer number (3722818770).

Almost surely, 2^20103221331 is an apocalyptic number.

20103221331 is a deficient number, since it is larger than the sum of its proper divisors (9679328829).

20103221331 is an equidigital number, since it uses as much as digits as its factorization.

20103221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744563762 (or 744563756 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20103221331 its reverse (13312230102), we get a palindrome (33415451433).

The spelling of 20103221331 in words is "twenty billion, one hundred three million, two hundred twenty-one thousand, three hundred thirty-one".