21120110111201 has 8 divisors (see below), whose sum is σ = 21484907864424. Its totient is φ = 20758365059200.

The previous prime is 21120110111197. The next prime is 21120110111209. The reversal of 21120110111201 is 10211101102112.

It can be written as a sum of positive squares in 4 ways, for example, as 12807129477025 + 8312980634176 = 3578705^2 + 2883224^2 .

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 21120110111201 - 2² = 21120110111197 is a prime.

It is a super-2 number, since 2×21120110111201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120110111209) 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, 763161350 + ... + 763189023.

It is an arithmetic number, because the mean of its divisors is an integer number (2685613483053).

Almost surely, 2^{21120110111201} is an apocalyptic number.

It is an amenable number.

21120110111201 is a deficient number, since it is larger than the sum of its proper divisors (364797753223).

21120110111201 is a wasteful number, since it uses less digits than its factorization.

21120110111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526350611.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21120110111201 its reverse (10211101102112), we get a palindrome (31331211213313).

The spelling of 21120110111201 in words is "twenty-one trillion, one hundred twenty billion, one hundred ten million, one hundred eleven thousand, two hundred one".