21211112001201 has 16 divisors (see below), whose sum is σ = 28336415459520. Its totient is φ = 14113293289920.

The previous prime is 21211112001187. The next prime is 21211112001241. The reversal of 21211112001201 is 10210021111212.

It is a happy number.

It is not a de Polignac number, because 21211112001201 - 2²² = 21211107806897 is a prime.

It is a super-2 number, since 2×21211112001201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211112001241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2333910 + ... + 6918768.

It is an arithmetic number, because the mean of its divisors is an integer number (1771025966220).

Almost surely, 2^{21211112001201} is an apocalyptic number.

It is an amenable number.

21211112001201 is a deficient number, since it is larger than the sum of its proper divisors (7125303458319).

21211112001201 is a wasteful number, since it uses less digits than its factorization.

21211112001201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587856.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21211112001201 its reverse (10210021111212), we get a palindrome (31421133112413).

The spelling of 21211112001201 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, one thousand, two hundred one".