12121243031 has 8 divisors (see below), whose sum is σ = 12511408800. Its totient is φ = 11734370208.

The previous prime is 12121242997. The next prime is 12121243051. The reversal of 12121243031 is 13034212121.

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

It is a cyclic number.

It is not a de Polignac number, because 12121243031 - 2⁶ = 12121242967 is a prime.

It is a super-2 number, since 2×12121243031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121242994 and 12121243012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121243051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815756 + ... + 830481.

It is an arithmetic number, because the mean of its divisors is an integer number (1563926100).

Almost surely, 2^12121243031 is an apocalyptic number.

12121243031 is a deficient number, since it is larger than the sum of its proper divisors (390165769).

12121243031 is a wasteful number, since it uses less digits than its factorization.

12121243031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646473.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12121243031 its reverse (13034212121), we get a palindrome (25155455152).

The spelling of 12121243031 in words is "twelve billion, one hundred twenty-one million, two hundred forty-three thousand, thirty-one".