21121120111201 has 8 divisors (see below), whose sum is σ = 23269352851008. Its totient is φ = 19010909190000.

The previous prime is 21121120111199. The next prime is 21121120111213. The reversal of 21121120111201 is 10211102112112.

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 21121120111201 - 2¹ = 21121120111199 is a prime.

It is a super-2 number, since 2×21121120111201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121120111601) 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, 9505453485 + ... + 9505455706.

It is an arithmetic number, because the mean of its divisors is an integer number (2908669106376).

Almost surely, 2^{21121120111201} is an apocalyptic number.

It is an amenable number.

21121120111201 is a deficient number, since it is larger than the sum of its proper divisors (2148232739807).

21121120111201 is a wasteful number, since it uses less digits than its factorization.

21121120111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19010909303.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21121120111201 its reverse (10211102112112), we get a palindrome (31332222223313).

The spelling of 21121120111201 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, two hundred one".