12021402308 has 12 divisors (see below), whose sum is σ = 21066159660. Its totient is φ = 6002499552.

The previous prime is 12021402307. The next prime is 12021402317. The reversal of 12021402308 is 80320412021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10452608644 + 1568793664 = 102238^2 + 39608^2 .

It is a super-2 number, since 2×12021402308² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12021402307) 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, 2047103 + ... + 2052966.

It is an arithmetic number, because the mean of its divisors is an integer number (1755513305).

Almost surely, 2^12021402308 is an apocalyptic number.

It is an amenable number.

12021402308 is a deficient number, since it is larger than the sum of its proper divisors (9044757352).

12021402308 is a wasteful number, since it uses less digits than its factorization.

12021402308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100806 (or 4100804 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12021402308 its reverse (80320412021), we get a palindrome (92341814329).

The spelling of 12021402308 in words is "twelve billion, twenty-one million, four hundred two thousand, three hundred eight".