12002121111021 has 8 divisors (see below), whose sum is σ = 16003747022784. Its totient is φ = 8000954636640.

The previous prime is 12002121110983. The next prime is 12002121111049. The reversal of 12002121111021 is 12011112120021.

It is a happy number.

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

It is not a de Polignac number, because 12002121111021 - 2¹⁰ = 12002121109997 is a prime.

It is a super-2 number, since 2×12002121111021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002121111121) 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, 114798385 + ... + 114902886.

It is an arithmetic number, because the mean of its divisors is an integer number (2000468377848).

Almost surely, 2^{12002121111021} is an apocalyptic number.

It is an amenable number.

12002121111021 is a deficient number, since it is larger than the sum of its proper divisors (4001625911763).

12002121111021 is a wasteful number, since it uses less digits than its factorization.

12002121111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229718691.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12002121111021 its reverse (12011112120021), we get a palindrome (24013233231042).

The spelling of 12002121111021 in words is "twelve trillion, two billion, one hundred twenty-one million, one hundred eleven thousand, twenty-one".