201021100939 has 2 divisors, whose sum is σ = 201021100940. Its totient is φ = 201021100938.

The previous prime is 201021100937. The next prime is 201021100949. The reversal of 201021100939 is 939001120102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201021100939 - 2¹ = 201021100937 is a prime.

Together with 201021100937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201021100937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510550469 + 100510550470.

It is an arithmetic number, because the mean of its divisors is an integer number (100510550470).

Almost surely, 2^201021100939 is an apocalyptic number.

201021100939 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021100939 is an equidigital number, since it uses as much as digits as its factorization.

201021100939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 201021100939 in words is "two hundred one billion, twenty-one million, one hundred thousand, nine hundred thirty-nine".