121211112211 has 32 divisors (see below), whose sum is σ = 145447769088. Its totient is φ = 98762716800.

The previous prime is 121211112203. The next prime is 121211112241. The reversal of 121211112211 is 112211112121.

It is a cyclic number.

It is not a de Polignac number, because 121211112211 - 2³ = 121211112203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211112241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18085161 + ... + 18091861.

It is an arithmetic number, because the mean of its divisors is an integer number (4545242784).

Almost surely, 2^121211112211 is an apocalyptic number.

121211112211 is a deficient number, since it is larger than the sum of its proper divisors (24236656877).

121211112211 is a wasteful number, since it uses less digits than its factorization.

121211112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7411.

The product of its digits is 16, while the sum is 16.

Adding to 121211112211 its reverse (112211112121), we get a palindrome (233422224332).

The spelling of 121211112211 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred eleven".