31204011001 has 4 divisors (see below), whose sum is σ = 31242582900. Its totient is φ = 31165439104.

The previous prime is 31204010977. The next prime is 31204011101. The reversal of 31204011001 is 10011040213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10312199401 + 20891811600 = 101549^2 + 144540^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204011001 - 2⁹ = 31204010489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31204011101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19284736 + ... + 19286353.

It is an arithmetic number, because the mean of its divisors is an integer number (7810645725).

Almost surely, 2^31204011001 is an apocalyptic number.

It is an amenable number.

31204011001 is a deficient number, since it is larger than the sum of its proper divisors (38571899).

31204011001 is an equidigital number, since it uses as much as digits as its factorization.

31204011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38571898.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31204011001 its reverse (10011040213), we get a palindrome (41215051214).

The spelling of 31204011001 in words is "thirty-one billion, two hundred four million, eleven thousand, one".