12000121201021 has 8 divisors (see below), whose sum is σ = 12713308825464. Its totient is φ = 11287744481280.

The previous prime is 12000121201009. The next prime is 12000121201027. The reversal of 12000121201021 is 12010212100021.

It can be written as a sum of positive squares in 4 ways, for example, as 167105993796 + 11833015207225 = 408786^2 + 3439915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12000121201021 - 2¹⁵ = 12000121168253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000121200992 and 12000121201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000121201027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202695700 + ... + 202754893.

It is an arithmetic number, because the mean of its divisors is an integer number (1589163603183).

Almost surely, 2^{12000121201021} is an apocalyptic number.

It is an amenable number.

12000121201021 is a deficient number, since it is larger than the sum of its proper divisors (713187624443).

12000121201021 is a wasteful number, since it uses less digits than its factorization.

12000121201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405452351.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12000121201021 its reverse (12010212100021), we get a palindrome (24010333301042).

The spelling of 12000121201021 in words is "twelve trillion, one hundred twenty-one million, two hundred one thousand, twenty-one".