21010010211101 has 4 divisors (see below), whose sum is σ = 21012138679104. Its totient is φ = 21007881743100.

The previous prime is 21010010211089. The next prime is 21010010211131. The reversal of 21010010211101 is 10111201001012.

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 a cyclic number.

It is not a de Polignac number, because 21010010211101 - 2¹⁸ = 21010009948957 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 (21010010211131) 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, 1064219195 + ... + 1064238936.

It is an arithmetic number, because the mean of its divisors is an integer number (5253034669776).

Almost surely, 2^{21010010211101} is an apocalyptic number.

It is an amenable number.

21010010211101 is a deficient number, since it is larger than the sum of its proper divisors (2128468003).

21010010211101 is an equidigital number, since it uses as much as digits as its factorization.

21010010211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128468002.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21010010211101 its reverse (10111201001012), we get a palindrome (31121211212113).

The spelling of 21010010211101 in words is "twenty-one trillion, ten billion, ten million, two hundred eleven thousand, one hundred one".