31200421031 has 8 divisors (see below), whose sum is σ = 33601879584. Its totient is φ = 28799166240.

The previous prime is 31200421009. The next prime is 31200421069. The reversal of 31200421031 is 13012400213.

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

It is not a de Polignac number, because 31200421031 - 2¹⁰ = 31200420007 is a prime.

It is a super-2 number, since 2×31200421031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200426031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448526 + ... + 513396.

It is an arithmetic number, because the mean of its divisors is an integer number (4200234948).

Almost surely, 2^31200421031 is an apocalyptic number.

31200421031 is a deficient number, since it is larger than the sum of its proper divisors (2401458553).

31200421031 is a wasteful number, since it uses less digits than its factorization.

31200421031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101881.

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

Adding to 31200421031 its reverse (13012400213), we get a palindrome (44212821244).

The spelling of 31200421031 in words is "thirty-one billion, two hundred million, four hundred twenty-one thousand, thirty-one".