11901031 has 2 divisors, whose sum is σ = 11901032. Its totient is φ = 11901030.

The previous prime is 11901023. The next prime is 11901073. The reversal of 11901031 is 13010911.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13010911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11901031 - 2³ = 11901023 is a prime.

It is a super-2 number, since 2×11901031² = 283269077725922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11900996 and 11901014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11902031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5950515 + 5950516.

It is an arithmetic number, because the mean of its divisors is an integer number (5950516).

Almost surely, 2^11901031 is an apocalyptic number.

11901031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11901031 is an equidigital number, since it uses as much as digits as its factorization.

11901031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 11901031 is about 3449.7870948799. The cubic root of 11901031 is about 228.3117145544.

Adding to 11901031 its reverse (13010911), we get a palindrome (24911942).

The spelling of 11901031 in words is "eleven million, nine hundred one thousand, thirty-one".