100131220103 has 4 divisors (see below), whose sum is σ = 100132422480. Its totient is φ = 100130017728.

The previous prime is 100131220099. The next prime is 100131220127. The reversal of 100131220103 is 301022131001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301022131001 = 15581 ⋅19319821.

It is a cyclic number.

It is not a de Polignac number, because 100131220103 - 2² = 100131220099 is a prime.

It is a super-2 number, since 2×100131220103² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100131220603) 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, 466163 + ... + 646196.

It is an arithmetic number, because the mean of its divisors is an integer number (25033105620).

Almost surely, 2^100131220103 is an apocalyptic number.

100131220103 is a deficient number, since it is larger than the sum of its proper divisors (1202377).

100131220103 is an equidigital number, since it uses as much as digits as its factorization.

100131220103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202376.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 100131220103 its reverse (301022131001), we get a palindrome (401153351104).

The spelling of 100131220103 in words is "one hundred billion, one hundred thirty-one million, two hundred twenty thousand, one hundred three".