10031121231 has 16 divisors (see below), whose sum is σ = 14181542400. Its totient is φ = 6289195968.

The previous prime is 10031121229. The next prime is 10031121251. The reversal of 10031121231 is 13212113001.

It is a happy number.

It is not a de Polignac number, because 10031121231 - 2¹ = 10031121229 is a prime.

It is a super-2 number, since 2×10031121231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10031121231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10031121251) 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 15 ways as a sum of consecutive naturals, for example, 634471 + ... + 650088.

It is an arithmetic number, because the mean of its divisors is an integer number (886346400).

Almost surely, 2^10031121231 is an apocalyptic number.

10031121231 is a deficient number, since it is larger than the sum of its proper divisors (4150421169).

10031121231 is a wasteful number, since it uses less digits than its factorization.

10031121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284718.

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

Adding to 10031121231 its reverse (13212113001), we get a palindrome (23243234232).

The spelling of 10031121231 in words is "ten billion, thirty-one million, one hundred twenty-one thousand, two hundred thirty-one".