12121103031 has 16 divisors (see below), whose sum is σ = 16770251520. Its totient is φ = 7781639040.

The previous prime is 12121103009. The next prime is 12121103051. The reversal of 12121103031 is 13030112121.

It is a happy number.

It is not a de Polignac number, because 12121103031 - 2¹⁷ = 12120971959 is a prime.

It is a super-2 number, since 2×12121103031² (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 12121103031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121103051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652546 + ... + 670863.

It is an arithmetic number, because the mean of its divisors is an integer number (1048140720).

Almost surely, 2^12121103031 is an apocalyptic number.

12121103031 is a deficient number, since it is larger than the sum of its proper divisors (4649148489).

12121103031 is a wasteful number, since it uses less digits than its factorization.

12121103031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323526.

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

Adding to 12121103031 its reverse (13030112121), we get a palindrome (25151215152).

The spelling of 12121103031 in words is "twelve billion, one hundred twenty-one million, one hundred three thousand, thirty-one".