20121211222201 has 4 divisors (see below), whose sum is σ = 20182000380304. Its totient is φ = 20060422064100.

The previous prime is 20121211222171. The next prime is 20121211222207. The reversal of 20121211222201 is 10222211212102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20121211222201 - 2¹³ = 20121211214009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121211222207) 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 3 ways as a sum of consecutive naturals, for example, 30394578555 + ... + 30394579216.

It is an arithmetic number, because the mean of its divisors is an integer number (5045500095076).

Almost surely, 2^{20121211222201} is an apocalyptic number.

It is an amenable number.

20121211222201 is a deficient number, since it is larger than the sum of its proper divisors (60789158103).

20121211222201 is an equidigital number, since it uses as much as digits as its factorization.

20121211222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60789158102.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20121211222201 its reverse (10222211212102), we get a palindrome (30343422434303).

The spelling of 20121211222201 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred one".