31230041021 has 8 divisors (see below), whose sum is σ = 31961986560. Its totient is φ = 30503380752.

The previous prime is 31230041009. The next prime is 31230041023. The reversal of 31230041021 is 12014003213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31230041021 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 (31230041023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309361 + ... + 1332998.

It is an arithmetic number, because the mean of its divisors is an integer number (3995248320).

Almost surely, 2^31230041021 is an apocalyptic number.

It is an amenable number.

31230041021 is a deficient number, since it is larger than the sum of its proper divisors (731945539).

31230041021 is a wasteful number, since it uses less digits than its factorization.

31230041021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642635.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31230041021 its reverse (12014003213), we get a palindrome (43244044234).

The spelling of 31230041021 in words is "thirty-one billion, two hundred thirty million, forty-one thousand, twenty-one".