21112001011101 has 64 divisors (see below), whose sum is σ = 38359014414336. Its totient is φ = 9972537696000.

The previous prime is 21112001011093. The next prime is 21112001011147. The reversal of 21112001011101 is 10111010021112.

It is not a de Polignac number, because 21112001011101 - 2³ = 21112001011093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112001011181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52263750 + ... + 52666151.

It is an arithmetic number, because the mean of its divisors is an integer number (599359600224).

Almost surely, 2^{21112001011101} is an apocalyptic number.

21112001011101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21112001011101 is a deficient number, since it is larger than the sum of its proper divisors (17247013403235).

21112001011101 is a wasteful number, since it uses less digits than its factorization.

21112001011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104930002.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21112001011101 its reverse (10111010021112), we get a palindrome (31223011032213).

The spelling of 21112001011101 in words is "twenty-one trillion, one hundred twelve billion, one million, eleven thousand, one hundred one".