2100021110101 has 16 divisors (see below), whose sum is σ = 2123981623296. Its totient is φ = 2076131546496.

The previous prime is 2100021110087. The next prime is 2100021110123. The reversal of 2100021110101 is 1010111200012.

It is a cyclic number.

It is not a de Polignac number, because 2100021110101 - 2¹⁷ = 2100020979029 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 (2100021110501) 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, 381611116 + ... + 381616618.

It is an arithmetic number, because the mean of its divisors is an integer number (132748851456).

Almost surely, 2^{2100021110101} is an apocalyptic number.

It is an amenable number.

2100021110101 is a deficient number, since it is larger than the sum of its proper divisors (23960513195).

2100021110101 is a wasteful number, since it uses less digits than its factorization.

2100021110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 2100021110101 its reverse (1010111200012), we get a palindrome (3110132310113).

It can be divided in two parts, 2100021 and 110101, that added together give a palindrome (2210122).

The spelling of 2100021110101 in words is "two trillion, one hundred billion, twenty-one million, one hundred ten thousand, one hundred one".