12001002122021 has 4 divisors (see below), whose sum is σ = 13092002314944. Its totient is φ = 10910001929100.

The previous prime is 12001002121967. The next prime is 12001002122063. The reversal of 12001002122021 is 12022120010021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12001002122021 - 2³⁰ = 11999928380197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001002121987 and 12001002122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001002127021) 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, 545500096445 + ... + 545500096466.

It is an arithmetic number, because the mean of its divisors is an integer number (3273000578736).

Almost surely, 2^{12001002122021} is an apocalyptic number.

12001002122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001002122021 is a deficient number, since it is larger than the sum of its proper divisors (1091000192923).

12001002122021 is a wasteful number, since it uses less digits than its factorization.

12001002122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091000192922.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001002122021 its reverse (12022120010021), we get a palindrome (24023122132042).

The spelling of 12001002122021 in words is "twelve trillion, one billion, two million, one hundred twenty-two thousand, twenty-one".