21100112001001 has 8 divisors (see below), whose sum is σ = 24229793685600. Its totient is φ = 18172345263840.

The previous prime is 21100112000959. The next prime is 21100112001013. The reversal of 21100112001001 is 10010021100112.

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 21100112001001 - 2¹³ = 21100111992809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100112001061) 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, 50478736636 + ... + 50478737053.

It is an arithmetic number, because the mean of its divisors is an integer number (3028724210700).

Almost surely, 2^{21100112001001} is an apocalyptic number.

It is an amenable number.

21100112001001 is a deficient number, since it is larger than the sum of its proper divisors (3129681684599).

21100112001001 is a wasteful number, since it uses less digits than its factorization.

21100112001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100957473719.

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

Adding to 21100112001001 its reverse (10010021100112), we get a palindrome (31110133101113).

The spelling of 21100112001001 in words is "twenty-one trillion, one hundred billion, one hundred twelve million, one thousand, one".