21010110001121 has 8 divisors (see below), whose sum is σ = 21974459860224. Its totient is φ = 20049999043360.

The previous prime is 21010110001109. The next prime is 21010110001157. The reversal of 21010110001121 is 12110001101012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010110001121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010110007121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059715196 + ... + 1059735021.

It is an arithmetic number, because the mean of its divisors is an integer number (2746807482528).

Almost surely, 2^{21010110001121} is an apocalyptic number.

It is an amenable number.

21010110001121 is a deficient number, since it is larger than the sum of its proper divisors (964349859103).

21010110001121 is a wasteful number, since it uses less digits than its factorization.

21010110001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119450671.

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

Adding to 21010110001121 its reverse (12110001101012), we get a palindrome (33120111102133).

The spelling of 21010110001121 in words is "twenty-one trillion, ten billion, one hundred ten million, one thousand, one hundred twenty-one".