11420031971 has 2 divisors, whose sum is σ = 11420031972. Its totient is φ = 11420031970.

The previous prime is 11420031899. The next prime is 11420032021. The reversal of 11420031971 is 17913002411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11420031971 is a prime.

It is not a weakly prime, because it can be changed into another prime (11420031671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710015985 + 5710015986.

It is an arithmetic number, because the mean of its divisors is an integer number (5710015986).

Almost surely, 2^11420031971 is an apocalyptic number.

11420031971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420031971 is an equidigital number, since it uses as much as digits as its factorization.

11420031971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 11420031971 in words is "eleven billion, four hundred twenty million, thirty-one thousand, nine hundred seventy-one".