100021001131 has 4 divisors (see below), whose sum is σ = 103470001200. Its totient is φ = 96572001064.

The previous prime is 100021001111. The next prime is 100021001147. The reversal of 100021001131 is 131100120001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131100120001 = 1987 ⋅65978923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100021001131 is a prime.

It is a super-2 number, since 2×100021001131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021001111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724499991 + ... + 1724500048.

It is an arithmetic number, because the mean of its divisors is an integer number (25867500300).

Almost surely, 2^100021001131 is an apocalyptic number.

100021001131 is a deficient number, since it is larger than the sum of its proper divisors (3449000069).

100021001131 is an equidigital number, since it uses as much as digits as its factorization.

100021001131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449000068.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 100021001131 its reverse (131100120001), we get a palindrome (231121121132).

The spelling of 100021001131 in words is "one hundred billion, twenty-one million, one thousand, one hundred thirty-one".