2100000220001 has 4 divisors (see below), whose sum is σ = 2151219737604. Its totient is φ = 2048780702400.

The previous prime is 2100000219997. The next prime is 2100000220007. The reversal of 2100000220001 is 1000220000012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118102195600 + 1981898024401 = 343660^2 + 1407799^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100000220001 - 2² = 2100000219997 is a prime.

It is a super-3 number, since 3×2100000220001³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100000220007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25609758740 + ... + 25609758821.

It is an arithmetic number, because the mean of its divisors is an integer number (537804934401).

Almost surely, 2^{2100000220001} is an apocalyptic number.

It is an amenable number.

2100000220001 is a deficient number, since it is larger than the sum of its proper divisors (51219517603).

2100000220001 is an equidigital number, since it uses as much as digits as its factorization.

2100000220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51219517602.

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

Adding to 2100000220001 its reverse (1000220000012), we get a palindrome (3100220220013).

The spelling of 2100000220001 in words is "two trillion, one hundred billion, two hundred twenty thousand, one".