9919101131 has 4 divisors (see below), whose sum is σ = 9932524200. Its totient is φ = 9905678064.

The previous prime is 9919101121. The next prime is 9919101133. The reversal of 9919101131 is 1311019199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1311019199 = 7 ⋅187288457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9919101131 is a prime.

It is a super-2 number, since 2×9919101131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9919101091 and 9919101100.

It is not an unprimeable number, because it can be changed into a prime (9919101133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6710426 + ... + 6711903.

It is an arithmetic number, because the mean of its divisors is an integer number (2483131050).

Almost surely, 2^9919101131 is an apocalyptic number.

9919101131 is a deficient number, since it is larger than the sum of its proper divisors (13423069).

9919101131 is a wasteful number, since it uses less digits than its factorization.

9919101131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13423068.

The product of its (nonzero) digits is 2187, while the sum is 35.

The square root of 9919101131 is about 99594.6842507169. The cubic root of 9919101131 is about 2148.6092416112.

The spelling of 9919101131 in words is "nine billion, nine hundred nineteen million, one hundred one thousand, one hundred thirty-one".