10031121321 has 32 divisors (see below), whose sum is σ = 14477473920. Its totient is φ = 6141464064.

The previous prime is 10031121277. The next prime is 10031121323. The reversal of 10031121321 is 12312113001.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10031121321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10031121321.

It is not an unprimeable number, because it can be changed into a prime (10031121323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8979855 + ... + 8980971.

It is an arithmetic number, because the mean of its divisors is an integer number (452421060).

Almost surely, 2^10031121321 is an apocalyptic number.

It is an amenable number.

10031121321 is a deficient number, since it is larger than the sum of its proper divisors (4446352599).

10031121321 is a wasteful number, since it uses less digits than its factorization.

10031121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 10031121321 its reverse (12312113001), we get a palindrome (22343234322).

The spelling of 10031121321 in words is "ten billion, thirty-one million, one hundred twenty-one thousand, three hundred twenty-one".