20121222211211 has 8 divisors (see below), whose sum is σ = 21969298211904. Its totient is φ = 18276291874120.

The previous prime is 20121222211183. The next prime is 20121222211241. The reversal of 20121222211211 is 11211222212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121222211211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121222211241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786402521 + ... + 786428106.

It is an arithmetic number, because the mean of its divisors is an integer number (2746162276488).

Almost surely, 2^{20121222211211} is an apocalyptic number.

20121222211211 is a deficient number, since it is larger than the sum of its proper divisors (1848076000693).

20121222211211 is a wasteful number, since it uses less digits than its factorization.

20121222211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572831801.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20121222211211 its reverse (11211222212102), we get a palindrome (31332444423313).

The spelling of 20121222211211 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eleven".