12101121200021 has 8 divisors (see below), whose sum is σ = 13829876698560. Its totient is φ = 10372371676128.

The previous prime is 12101121200009. The next prime is 12101121200033. The reversal of 12101121200021 is 12000212110121.

It is an interprime number because it is at equal distance from previous prime (12101121200009) and next prime (12101121200033).

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

It is not a de Polignac number, because 12101121200021 - 2¹⁰ = 12101121198997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101121199969 and 12101121200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101121200041) 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, 4393385 + ... + 6595761.

It is an arithmetic number, because the mean of its divisors is an integer number (1728734587320).

Almost surely, 2^{12101121200021} is an apocalyptic number.

It is an amenable number.

12101121200021 is a deficient number, since it is larger than the sum of its proper divisors (1728755498539).

12101121200021 is an equidigital number, since it uses as much as digits as its factorization.

12101121200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987323.

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

Adding to 12101121200021 its reverse (12000212110121), we get a palindrome (24101333310142).

The spelling of 12101121200021 in words is "twelve trillion, one hundred one billion, one hundred twenty-one million, two hundred thousand, twenty-one".