31200240421 has 8 divisors (see below), whose sum is σ = 35806613760. Its totient is φ = 26631166128.

The previous prime is 31200240373. The next prime is 31200240451. The reversal of 31200240421 is 12404200213.

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

It is not a de Polignac number, because 31200240421 - 2²¹ = 31198143269 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 (31200240451) 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 in 7 ways as a sum of consecutive naturals, for example, 9322966 + ... + 9326311.

It is an arithmetic number, because the mean of its divisors is an integer number (4475826720).

Almost surely, 2^31200240421 is an apocalyptic number.

It is an amenable number.

31200240421 is a deficient number, since it is larger than the sum of its proper divisors (4606373339).

31200240421 is a wasteful number, since it uses less digits than its factorization.

31200240421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18649523.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31200240421 its reverse (12404200213), we get a palindrome (43604440634).

The spelling of 31200240421 in words is "thirty-one billion, two hundred million, two hundred forty thousand, four hundred twenty-one".