2100210101021 has 8 divisors (see below), whose sum is σ = 2108167875840. Its totient is φ = 2092265448912.

The previous prime is 2100210100991. The next prime is 2100210101027. The reversal of 2100210101021 is 1201010120012.

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 2100210101021 - 2¹⁰ = 2100210099997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100210100993 and 2100210101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100210101027) 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, 2959925 + ... + 3600218.

It is an arithmetic number, because the mean of its divisors is an integer number (263520984480).

Almost surely, 2^{2100210101021} is an apocalyptic number.

It is an amenable number.

2100210101021 is a deficient number, since it is larger than the sum of its proper divisors (7957774819).

2100210101021 is an equidigital number, since it uses as much as digits as its factorization.

2100210101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561355.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2100210101021 its reverse (1201010120012), we get a palindrome (3301220221033).

The spelling of 2100210101021 in words is "two trillion, one hundred billion, two hundred ten million, one hundred one thousand, twenty-one".