12002121110021 has 4 divisors (see below), whose sum is σ = 13716709840032. Its totient is φ = 10287532380012.

The previous prime is 12002121109997. The next prime is 12002121110033. The reversal of 12002121110021 is 12001112120021.

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 12002121110021 - 2²² = 12002116915717 is a prime.

It is a super-2 number, since 2×12002121110021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002121109978 and 12002121110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002121110071) 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, 857294364995 + ... + 857294365008.

It is an arithmetic number, because the mean of its divisors is an integer number (3429177460008).

Almost surely, 2^{12002121110021} is an apocalyptic number.

It is an amenable number.

12002121110021 is a deficient number, since it is larger than the sum of its proper divisors (1714588730011).

12002121110021 is an equidigital number, since it uses as much as digits as its factorization.

12002121110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714588730010.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12002121110021 its reverse (12001112120021), we get a palindrome (24003233230042).

The spelling of 12002121110021 in words is "twelve trillion, two billion, one hundred twenty-one million, one hundred ten thousand, twenty-one".