12001021022 has 4 divisors (see below), whose sum is σ = 18001531536. Its totient is φ = 6000510510.

The previous prime is 12001021013. The next prime is 12001021057. The reversal of 12001021022 is 22012010021.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12001020994 and 12001021012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000255254 + ... + 3000255257.

It is an arithmetic number, because the mean of its divisors is an integer number (4500382884).

Almost surely, 2^12001021022 is an apocalyptic number.

12001021022 is a deficient number, since it is larger than the sum of its proper divisors (6000510514).

12001021022 is an equidigital number, since it uses as much as digits as its factorization.

12001021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000510513.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12001021022 its reverse (22012010021), we get a palindrome (34013031043).

The spelling of 12001021022 in words is "twelve billion, one million, twenty-one thousand, twenty-two".