2100001221011 has 8 divisors (see below), whose sum is σ = 2100572022720. Its totient is φ = 2099430511848.

The previous prime is 2100001220983. The next prime is 2100001221053. The reversal of 2100001221011 is 1101221000012.

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 2100001221011 - 2²² = 2099997026707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100001220983 and 2100001221001.

It is not an unprimeable number, because it can be changed into a prime (2100001221911) 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, 71955020 + ... + 71984198.

It is an arithmetic number, because the mean of its divisors is an integer number (262571502840).

Almost surely, 2^{2100001221011} is an apocalyptic number.

2100001221011 is a deficient number, since it is larger than the sum of its proper divisors (570801709).

2100001221011 is an equidigital number, since it uses as much as digits as its factorization.

2100001221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46273.

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

Adding to 2100001221011 its reverse (1101221000012), we get a palindrome (3201222221023).

The spelling of 2100001221011 in words is "two trillion, one hundred billion, one million, two hundred twenty-one thousand, eleven".