121212112102111 has 16 divisors (see below), whose sum is σ = 121576987908000. Its totient is φ = 120847590028800.

The previous prime is 121212112102091. The next prime is 121212112102163. The reversal of 121212112102111 is 111201211212121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212112102111 is a prime.

It is a super-2 number, since 2×121212112102111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212112102511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9869883291 + ... + 9869895571.

It is an arithmetic number, because the mean of its divisors is an integer number (7598561744250).

Almost surely, 2^{121212112102111} is an apocalyptic number.

121212112102111 is a deficient number, since it is larger than the sum of its proper divisors (364875805889).

121212112102111 is a wasteful number, since it uses less digits than its factorization.

121212112102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24330.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121212112102111 its reverse (111201211212121), we get a palindrome (232413323314232).

The spelling of 121212112102111 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred twelve million, one hundred two thousand, one hundred eleven".