12000012001021 has 6 divisors (see below), whose sum is σ = 13190095835966. Its totient is φ = 10909101819000.

The previous prime is 12000012001001. The next prime is 12000012001039. The reversal of 12000012001021 is 12010021000021.

It can be written as a sum of positive squares in only one way, i.e., 6025360624921 + 5974651376100 = 2454661^2 + 2444310^2 .

It is not a de Polignac number, because 12000012001021 - 2¹⁷ = 12000011869949 is a prime.

It is a super-3 number, since 3×12000012001021³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000012000989 and 12000012001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000012001001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49586826330 + ... + 49586826571.

Almost surely, 2^{12000012001021} is an apocalyptic number.

12000012001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12000012001021 is a deficient number, since it is larger than the sum of its proper divisors (1190083834945).

12000012001021 is an equidigital number, since it uses as much as digits as its factorization.

12000012001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99173652923 (or 99173652912 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12000012001021 its reverse (12010021000021), we get a palindrome (24010033001042).

The spelling of 12000012001021 in words is "twelve trillion, twelve million, one thousand, twenty-one".