20103102231 has 4 divisors (see below), whose sum is σ = 26804136312. Its totient is φ = 13402068152.

The previous prime is 20103102223. The next prime is 20103102241. The reversal of 20103102231 is 13220130102.

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

It is a cyclic number.

It is not a de Polignac number, because 20103102231 - 2³ = 20103102223 is a prime.

It is a super-2 number, since 2×20103102231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20103102231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103102211) 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, 3350517036 + ... + 3350517041.

It is an arithmetic number, because the mean of its divisors is an integer number (6701034078).

Almost surely, 2^20103102231 is an apocalyptic number.

20103102231 is a deficient number, since it is larger than the sum of its proper divisors (6701034081).

20103102231 is an equidigital number, since it uses as much as digits as its factorization.

20103102231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6701034080.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20103102231 its reverse (13220130102), we get a palindrome (33323232333).

The spelling of 20103102231 in words is "twenty billion, one hundred three million, one hundred two thousand, two hundred thirty-one".