12101211200021 has 8 divisors (see below), whose sum is σ = 12159287703000. Its totient is φ = 12043241163520.

The previous prime is 12101211200009. The next prime is 12101211200033. The reversal of 12101211200021 is 12000211210121.

It is an interprime number because it is at equal distance from previous prime (12101211200009) and next prime (12101211200033).

It can be written as a sum of positive squares in 4 ways, for example, as 3593261448100 + 8507949751921 = 1895590^2 + 2916839^2 .

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 12101211200021 - 2¹⁴ = 12101211183637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101211199969 and 12101211200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101211200081) 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, 26388746 + ... + 26843403.

It is an arithmetic number, because the mean of its divisors is an integer number (1519910962875).

Almost surely, 2^{12101211200021} is an apocalyptic number.

It is an amenable number.

12101211200021 is a deficient number, since it is larger than the sum of its proper divisors (58076502979).

12101211200021 is an equidigital number, since it uses as much as digits as its factorization.

12101211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53233239.

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

Adding to 12101211200021 its reverse (12000211210121), we get a palindrome (24101422410142).

It can be divided in two parts, 1210121 and 1200021, that added together give a palindrome (2410142).

The spelling of 12101211200021 in words is "twelve trillion, one hundred one billion, two hundred eleven million, two hundred thousand, twenty-one".