2101100020221 has 16 divisors (see below), whose sum is σ = 2881588207104. Its totient is φ = 1360788542784.

The previous prime is 2101100020219. The next prime is 2101100020223. The reversal of 2101100020221 is 1220200011012.

It is an interprime number because it is at equal distance from previous prime (2101100020219) and next prime (2101100020223).

It is not a de Polignac number, because 2101100020221 - 2¹ = 2101100020219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101100020197 and 2101100020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101100020223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14421261 + ... + 14566226.

It is an arithmetic number, because the mean of its divisors is an integer number (180099262944).

Almost surely, 2^{2101100020221} is an apocalyptic number.

It is an amenable number.

2101100020221 is a deficient number, since it is larger than the sum of its proper divisors (780488186883).

2101100020221 is a wasteful number, since it uses less digits than its factorization.

2101100020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28988180.

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

Adding to 2101100020221 its reverse (1220200011012), we get a palindrome (3321300031233).

The spelling of 2101100020221 in words is "two trillion, one hundred one billion, one hundred million, twenty thousand, two hundred twenty-one".