21110020101101 has 16 divisors (see below), whose sum is σ = 21329491622400. Its totient is φ = 20890833276288.

The previous prime is 21110020101097. The next prime is 21110020101103. The reversal of 21110020101101 is 10110102001112.

It is a cyclic number.

It is not a de Polignac number, because 21110020101101 - 2² = 21110020101097 is a prime.

It is a super-2 number, since 2×21110020101101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110020101103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030903475 + ... + 1030923951.

It is an arithmetic number, because the mean of its divisors is an integer number (1333093226400).

Almost surely, 2^{21110020101101} is an apocalyptic number.

It is an amenable number.

21110020101101 is a deficient number, since it is larger than the sum of its proper divisors (219471521299).

21110020101101 is a wasteful number, since it uses less digits than its factorization.

21110020101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26908.

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

Adding to 21110020101101 its reverse (10110102001112), we get a palindrome (31220122102213).

The spelling of 21110020101101 in words is "twenty-one trillion, one hundred ten billion, twenty million, one hundred one thousand, one hundred one".