12101010021021 has 4 divisors (see below), whose sum is σ = 16134680028032. Its totient is φ = 8067340014012.

The previous prime is 12101010021007. The next prime is 12101010021091. The reversal of 12101010021021 is 12012001010121.

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 not a de Polignac number, because 12101010021021 - 2¹¹ = 12101010018973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101010020988 and 12101010021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101010021091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016835003501 + ... + 2016835003506.

It is an arithmetic number, because the mean of its divisors is an integer number (4033670007008).

Almost surely, 2^{12101010021021} is an apocalyptic number.

It is an amenable number.

12101010021021 is a deficient number, since it is larger than the sum of its proper divisors (4033670007011).

12101010021021 is an equidigital number, since it uses as much as digits as its factorization.

12101010021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033670007010.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12101010021021 its reverse (12012001010121), we get a palindrome (24113011031142).

The spelling of 12101010021021 in words is "twelve trillion, one hundred one billion, ten million, twenty-one thousand, twenty-one".