12120287631 has 4 divisors (see below), whose sum is σ = 16160383512. Its totient is φ = 8080191752.

The previous prime is 12120287629. The next prime is 12120287633. The reversal of 12120287631 is 13678202121.

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

It is an interprime number because it is at equal distance from previous prime (12120287629) and next prime (12120287633).

It is a cyclic number.

It is not a de Polignac number, because 12120287631 - 2¹ = 12120287629 is a prime.

It is a super-2 number, since 2×12120287631² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120287592 and 12120287601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120287633) 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 3 ways as a sum of consecutive naturals, for example, 2020047936 + ... + 2020047941.

It is an arithmetic number, because the mean of its divisors is an integer number (4040095878).

Almost surely, 2^12120287631 is an apocalyptic number.

12120287631 is a deficient number, since it is larger than the sum of its proper divisors (4040095881).

12120287631 is an equidigital number, since it uses as much as digits as its factorization.

12120287631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040095880.

The product of its (nonzero) digits is 8064, while the sum is 33.

Adding to 12120287631 its reverse (13678202121), we get a palindrome (25798489752).

The spelling of 12120287631 in words is "twelve billion, one hundred twenty million, two hundred eighty-seven thousand, six hundred thirty-one".