212212221121201 has 16 divisors (see below), whose sum is σ = 246655809244800. Its totient is φ = 178800944836608.

The previous prime is 212212221121171. The next prime is 212212221121223. The reversal of 212212221121201 is 102121122212212.

It is a cyclic number.

It is not a de Polignac number, because 212212221121201 - 2³³ = 212203631186609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212212221121261) 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, 11578486 + ... + 23632303.

It is an arithmetic number, because the mean of its divisors is an integer number (15415988077800).

Almost surely, 2^{212212221121201} is an apocalyptic number.

It is an amenable number.

212212221121201 is a deficient number, since it is larger than the sum of its proper divisors (34443588123599).

212212221121201 is a wasteful number, since it uses less digits than its factorization.

212212221121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35225448.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212212221121201 its reverse (102121122212212), we get a palindrome (314333343333413).

The spelling of 212212221121201 in words is "two hundred twelve trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred one".