12101021331 has 24 divisors (see below), whose sum is σ = 18774418320. Its totient is φ = 6912847872.

The previous prime is 12101021329. The next prime is 12101021357. The reversal of 12101021331 is 13312010121.

It is a happy number.

It is not a de Polignac number, because 12101021331 - 2¹ = 12101021329 is a prime.

It is a super-2 number, since 2×12101021331² (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 12101021331.

It is not an unprimeable number, because it can be changed into a prime (12101021431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 596995 + ... + 616931.

It is an arithmetic number, because the mean of its divisors is an integer number (782267430).

Almost surely, 2^12101021331 is an apocalyptic number.

12101021331 is a deficient number, since it is larger than the sum of its proper divisors (6673396989).

12101021331 is a wasteful number, since it uses less digits than its factorization.

12101021331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24083 (or 24076 counting only the distinct ones).

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

Adding to 12101021331 its reverse (13312010121), we get a palindrome (25413031452).

The spelling of 12101021331 in words is "twelve billion, one hundred one million, twenty-one thousand, three hundred thirty-one".