101001001939 has 2 divisors, whose sum is σ = 101001001940. Its totient is φ = 101001001938.

The previous prime is 101001001921. The next prime is 101001002027. The reversal of 101001001939 is 939100100101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101001001939 - 2¹⁵ = 101000969171 is a prime.

It is not a weakly prime, because it can be changed into another prime (101001001039) 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 as a sum of consecutive naturals, namely, 50500500969 + 50500500970.

It is an arithmetic number, because the mean of its divisors is an integer number (50500500970).

Almost surely, 2^101001001939 is an apocalyptic number.

101001001939 is a deficient number, since it is larger than the sum of its proper divisors (1).

101001001939 is an equidigital number, since it uses as much as digits as its factorization.

101001001939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 25.

The spelling of 101001001939 in words is "one hundred one billion, one million, one thousand, nine hundred thirty-nine".