2221212212211 has 8 divisors (see below), whose sum is σ = 3063740982480. Its totient is φ = 1429745791712.

The previous prime is 2221212212209. The next prime is 2221212212267. The reversal of 2221212212211 is 1122122121222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221212212211 - 2¹ = 2221212212209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221212212291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12765587340 + ... + 12765587513.

It is an arithmetic number, because the mean of its divisors is an integer number (382967622810).

Almost surely, 2^{2221212212211} is an apocalyptic number.

2221212212211 is a deficient number, since it is larger than the sum of its proper divisors (842528770269).

2221212212211 is a wasteful number, since it uses less digits than its factorization.

2221212212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25531174885.

The product of its digits is 256, while the sum is 21.

Adding to 2221212212211 its reverse (1122122121222), we get a palindrome (3343334333433).

The spelling of 2221212212211 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred eleven".