211111222121102 has 32 divisors (see below), whose sum is σ = 330667928112960. Its totient is φ = 100895065089280.

The previous prime is 211111222121071. The next prime is 211111222121119. The reversal of 211111222121102 is 201121222111112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673801202 + ... + 674114442.

It is an arithmetic number, because the mean of its divisors is an integer number (10333372753530).

Almost surely, 2^{211111222121102} is an apocalyptic number.

211111222121102 is a deficient number, since it is larger than the sum of its proper divisors (119556705991858).

211111222121102 is a wasteful number, since it uses less digits than its factorization.

211111222121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323548.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211111222121102 its reverse (201121222111112), we get a palindrome (412232444232214).

The spelling of 211111222121102 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred two".