21010211121101 has 8 divisors (see below), whose sum is σ = 21367018965600. Its totient is φ = 20653426695760.

The previous prime is 21010211121083. The next prime is 21010211121191. The reversal of 21010211121101 is 10112111201012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21010211121101 - 2⁶ = 21010211121037 is a prime.

It is a super-2 number, since 2×21010211121101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010211121191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040546 + ... + 7638483.

It is an arithmetic number, because the mean of its divisors is an integer number (2670877370700).

Almost surely, 2^{21010211121101} is an apocalyptic number.

It is an amenable number.

21010211121101 is a deficient number, since it is larger than the sum of its proper divisors (356807844499).

21010211121101 is a wasteful number, since it uses less digits than its factorization.

21010211121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11709579.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21010211121101 its reverse (10112111201012), we get a palindrome (31122322322113).

The spelling of 21010211121101 in words is "twenty-one trillion, ten billion, two hundred eleven million, one hundred twenty-one thousand, one hundred one".