2100012021021 has 8 divisors (see below), whose sum is σ = 2800052760384. Its totient is φ = 1399989647840.

The previous prime is 2100012020947. The next prime is 2100012021053. The reversal of 2100012021021 is 1201202100012.

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 2100012021021 - 2¹⁰ = 2100012019997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100012020988 and 2100012021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100012021421) 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 7 ways as a sum of consecutive naturals, for example, 4322496 + ... + 4783721.

It is an arithmetic number, because the mean of its divisors is an integer number (350006595048).

Almost surely, 2^{2100012021021} is an apocalyptic number.

It is an amenable number.

2100012021021 is a deficient number, since it is larger than the sum of its proper divisors (700040739363).

2100012021021 is an equidigital number, since it uses as much as digits as its factorization.

2100012021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9183091.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2100012021021 its reverse (1201202100012), we get a palindrome (3301214121033).

The spelling of 2100012021021 in words is "two trillion, one hundred billion, twelve million, twenty-one thousand, twenty-one".