12021211131 has 8 divisors (see below), whose sum is σ = 16032277824. Its totient is φ = 8012142600.

The previous prime is 12021211129. The next prime is 12021211133. The reversal of 12021211131 is 13111212021.

It is an interprime number because it is at equal distance from previous prime (12021211129) and next prime (12021211133).

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

It is not a de Polignac number, because 12021211131 - 2¹ = 12021211129 is a prime.

It is a super-2 number, since 2×12021211131² (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 12021211131.

It is not an unprimeable number, because it can be changed into a prime (12021211133) 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, 485445 + ... + 509606.

It is an arithmetic number, because the mean of its divisors is an integer number (2004034728).

Almost surely, 2^12021211131 is an apocalyptic number.

12021211131 is a deficient number, since it is larger than the sum of its proper divisors (4011066693).

12021211131 is an equidigital number, since it uses as much as digits as its factorization.

12021211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999081.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12021211131 its reverse (13111212021), we get a palindrome (25132423152).

The spelling of 12021211131 in words is "twelve billion, twenty-one million, two hundred eleven thousand, one hundred thirty-one".