21212012011201 has 32 divisors (see below), whose sum is σ = 23461125120000. Its totient is φ = 19017523071360.

The previous prime is 21212012011187. The next prime is 21212012011207. The reversal of 21212012011201 is 10211021021212.

It is not a de Polignac number, because 21212012011201 - 2¹³ = 21212012003009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212012011207) 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 31 ways as a sum of consecutive naturals, for example, 1021812060 + ... + 1021832818.

It is an arithmetic number, because the mean of its divisors is an integer number (733160160000).

Almost surely, 2^{21212012011201} is an apocalyptic number.

It is an amenable number.

21212012011201 is a deficient number, since it is larger than the sum of its proper divisors (2249113108799).

21212012011201 is a wasteful number, since it uses less digits than its factorization.

21212012011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23517.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212012011201 its reverse (10211021021212), we get a palindrome (31423033032413).

The spelling of 21212012011201 in words is "twenty-one trillion, two hundred twelve billion, twelve million, eleven thousand, two hundred one".