12001121203031 has 4 divisors (see below), whose sum is σ = 12001150470000. Its totient is φ = 12001091936064.

The previous prime is 12001121202977. The next prime is 12001121203117. The reversal of 12001121203031 is 13030212110021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001121203031 is a prime.

It is a super-2 number, since 2×12001121203031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001121203231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14009531 + ... + 14841468.

It is an arithmetic number, because the mean of its divisors is an integer number (3000287617500).

Almost surely, 2^{12001121203031} is an apocalyptic number.

12001121203031 is a deficient number, since it is larger than the sum of its proper divisors (29266969).

12001121203031 is an equidigital number, since it uses as much as digits as its factorization.

12001121203031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29266968.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12001121203031 its reverse (13030212110021), we get a palindrome (25031333313052).

The spelling of 12001121203031 in words is "twelve trillion, one billion, one hundred twenty-one million, two hundred three thousand, thirty-one".