2101002021101 has 4 divisors (see below), whose sum is σ = 2101004930304. Its totient is φ = 2100999111900.

The previous prime is 2101002021061. The next prime is 2101002021143. The reversal of 2101002021101 is 1011202001012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101002021101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101002051101) 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, 544436 + ... + 2120946.

It is an arithmetic number, because the mean of its divisors is an integer number (525251232576).

Almost surely, 2^{2101002021101} is an apocalyptic number.

It is an amenable number.

2101002021101 is a deficient number, since it is larger than the sum of its proper divisors (2909203).

2101002021101 is a wasteful number, since it uses less digits than its factorization.

2101002021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909202.

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

Adding to 2101002021101 its reverse (1011202001012), we get a palindrome (3112204022113).

The spelling of 2101002021101 in words is "two trillion, one hundred one billion, two million, twenty-one thousand, one hundred one".