121212230211 has 12 divisors (see below), whose sum is σ = 175101123288. Its totient is φ = 80800403904.

The previous prime is 121212230203. The next prime is 121212230239. The reversal of 121212230211 is 112032212121.

121212230211 is a `hidden beast` number, since 1 + 212 + 12 + 230 + 211 = 666.

It is not a de Polignac number, because 121212230211 - 2³ = 121212230203 is a prime.

It is a super-2 number, since 2×121212230211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121212230261) 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, 545925 + ... + 735158.

It is an arithmetic number, because the mean of its divisors is an integer number (14591760274).

Almost surely, 2^121212230211 is an apocalyptic number.

121212230211 is a deficient number, since it is larger than the sum of its proper divisors (53888893077).

121212230211 is a wasteful number, since it uses less digits than its factorization.

121212230211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291602 (or 1291599 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121212230211 its reverse (112032212121), we get a palindrome (233244442332).

The spelling of 121212230211 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred thirty thousand, two hundred eleven".