201024039991 has 4 divisors (see below), whose sum is σ = 201025973232. Its totient is φ = 201022106752.

The previous prime is 201024039971. The next prime is 201024040013. The reversal of 201024039991 is 199930420102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201024039991 - 2⁷ = 201024039863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201024039901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801211 + ... + 1021756.

It is an arithmetic number, because the mean of its divisors is an integer number (50256493308).

Almost surely, 2^201024039991 is an apocalyptic number.

201024039991 is a deficient number, since it is larger than the sum of its proper divisors (1933241).

201024039991 is a wasteful number, since it uses less digits than its factorization.

201024039991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933240.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 201024039991 in words is "two hundred one billion, twenty-four million, thirty-nine thousand, nine hundred ninety-one".