2100210001001 has 8 divisors (see below), whose sum is σ = 2403361255680. Its totient is φ = 1797839059968.

The previous prime is 2100210000997. The next prime is 2100210001007. The reversal of 2100210001001 is 1001000120012.

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

It is not a de Polignac number, because 2100210001001 - 2² = 2100210000997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100210001001.

It is not an unprimeable number, because it can be changed into a prime (2100210001007) 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, 195072641 + ... + 195083406.

It is an arithmetic number, because the mean of its divisors is an integer number (300420156960).

Almost surely, 2^{2100210001001} is an apocalyptic number.

It is an amenable number.

2100210001001 is a deficient number, since it is larger than the sum of its proper divisors (303151254679).

2100210001001 is an equidigital number, since it uses as much as digits as its factorization.

2100210001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390156823.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 2100210001001 its reverse (1001000120012), we get a palindrome (3101210121013).

The spelling of 2100210001001 in words is "two trillion, one hundred billion, two hundred ten million, one thousand, one".