121210120212111 has 24 divisors (see below), whose sum is σ = 206992651925280. Its totient is φ = 66874549081536.

The previous prime is 121210120212109. The next prime is 121210120212121. The reversal of 121210120212111 is 111212021012121.

It is a happy number.

121210120212111 is a `hidden beast` number, since 1 + 212 + 10 + 120 + 212 + 111 = 666.

It is not a de Polignac number, because 121210120212111 - 2¹ = 121210120212109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210120212121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33171897520 + ... + 33171901173.

It is an arithmetic number, because the mean of its divisors is an integer number (8624693830220).

Almost surely, 2^{121210120212111} is an apocalyptic number.

121210120212111 is a deficient number, since it is larger than the sum of its proper divisors (85782531713169).

121210120212111 is a wasteful number, since it uses less digits than its factorization.

121210120212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66343798735 (or 66343798732 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121210120212111 its reverse (111212021012121), we get a palindrome (232422141224232).

The spelling of 121210120212111 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, two hundred twelve thousand, one hundred eleven".