21010010111101 has 4 divisors (see below), whose sum is σ = 22920011030304. Its totient is φ = 19100009191900.

The previous prime is 21010010111089. The next prime is 21010010111113. The reversal of 21010010111101 is 10111101001012.

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.

It is an interprime number because it is at equal distance from previous prime (21010010111089) and next prime (21010010111113).

It is a cyclic number.

It is not a de Polignac number, because 21010010111101 - 2¹⁵ = 21010010078333 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 (21010010112101) 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, 955000459585 + ... + 955000459606.

It is an arithmetic number, because the mean of its divisors is an integer number (5730002757576).

Almost surely, 2^{21010010111101} is an apocalyptic number.

It is an amenable number.

21010010111101 is a deficient number, since it is larger than the sum of its proper divisors (1910000919203).

21010010111101 is a wasteful number, since it uses less digits than its factorization.

21010010111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910000919202.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21010010111101 its reverse (10111101001012), we get a palindrome (31121111112113).

The spelling of 21010010111101 in words is "twenty-one trillion, ten billion, ten million, one hundred eleven thousand, one hundred one".