12101210210021 has 8 divisors (see below), whose sum is σ = 12356520224664. Its totient is φ = 11848320195840.

The previous prime is 12101210209943. The next prime is 12101210210081. The reversal of 12101210210021 is 12001201210121.

12101210210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 444182260900 + 11657027949121 = 666470^2 + 3414239^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101210210021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101210209978 and 12101210210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101210210081) 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, 604990010 + ... + 605010011.

It is an arithmetic number, because the mean of its divisors is an integer number (1544565028083).

Almost surely, 2^{12101210210021} is an apocalyptic number.

It is an amenable number.

12101210210021 is a deficient number, since it is larger than the sum of its proper divisors (255310014643).

12101210210021 is a wasteful number, since it uses less digits than its factorization.

12101210210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210000231.

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

Adding to 12101210210021 its reverse (12001201210121), we get a palindrome (24102411420142).

The spelling of 12101210210021 in words is "twelve trillion, one hundred one billion, two hundred ten million, two hundred ten thousand, twenty-one".