211202220121111 has 12 divisors (see below), whose sum is σ = 220925793357360. Its totient is φ = 201889931355200.

The previous prime is 211202220121103. The next prime is 211202220121117. The reversal of 211202220121111 is 111121022202112.

It is a happy number.

It is not a de Polignac number, because 211202220121111 - 2³ = 211202220121103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202220121117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127221490 + ... + 128870911.

It is an arithmetic number, because the mean of its divisors is an integer number (18410482779780).

Almost surely, 2^{211202220121111} is an apocalyptic number.

211202220121111 is a deficient number, since it is larger than the sum of its proper divisors (9723573236249).

211202220121111 is a wasteful number, since it uses less digits than its factorization.

211202220121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256094006 (or 256093983 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211202220121111 its reverse (111121022202112), we get a palindrome (322323242323223).

The spelling of 211202220121111 in words is "two hundred eleven trillion, two hundred two billion, two hundred twenty million, one hundred twenty-one thousand, one hundred eleven".