21110020111201 has 16 divisors (see below), whose sum is σ = 24272547856128. Its totient is φ = 17984258424000.

The previous prime is 21110020111199. The next prime is 21110020111231. The reversal of 21110020111201 is 10211102001112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21110020111201 - 2¹ = 21110020111199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110020111231) 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, 1357116 + ... + 6637906.

It is an arithmetic number, because the mean of its divisors is an integer number (1517034241008).

Almost surely, 2^{21110020111201} is an apocalyptic number.

It is an amenable number.

21110020111201 is a deficient number, since it is larger than the sum of its proper divisors (3162527744927).

21110020111201 is a wasteful number, since it uses less digits than its factorization.

21110020111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284272.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110020111201 its reverse (10211102001112), we get a palindrome (31321122112313).

The spelling of 21110020111201 in words is "twenty-one trillion, one hundred ten billion, twenty million, one hundred eleven thousand, two hundred one".