211221222122116 has 24 divisors (see below), whose sum is σ = 385394138680320. Its totient is φ = 101165961389472.

The previous prime is 211221222122077. The next prime is 211221222122117. The reversal of 211221222122116 is 611221222122112.

It is a super-3 number, since 3×211221222122116³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (211221222122117) 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, 7168775050 + ... + 7168804513.

It is an arithmetic number, because the mean of its divisors is an integer number (16058089111680).

Almost surely, 2^{211221222122116} is an apocalyptic number.

It is an amenable number.

211221222122116 is a deficient number, since it is larger than the sum of its proper divisors (174172916558204).

211221222122116 is a wasteful number, since it uses less digits than its factorization.

211221222122116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14337579723 (or 14337579721 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

Adding to 211221222122116 its reverse (611221222122112), we get a palindrome (822442444244228).

The spelling of 211221222122116 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred sixteen".