221212012012001 has 16 divisors (see below), whose sum is σ = 222871631673600. Its totient is φ = 219557239574400.

The previous prime is 221212012011971. The next prime is 221212012012087. The reversal of 221212012012001 is 100210210212122.

221212012012001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221212012012001 - 2²⁶ = 221211944903137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212012018001) 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, 2693101190 + ... + 2693183328.

It is an arithmetic number, because the mean of its divisors is an integer number (13929476979600).

Almost surely, 2^{221212012012001} is an apocalyptic number.

It is an amenable number.

221212012012001 is a deficient number, since it is larger than the sum of its proper divisors (1659619661599).

221212012012001 is a wasteful number, since it uses less digits than its factorization.

221212012012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111400.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221212012012001 its reverse (100210210212122), we get a palindrome (321422222224123).

The spelling of 221212012012001 in words is "two hundred twenty-one trillion, two hundred twelve billion, twelve million, twelve thousand, one".