121112221212111 has 8 divisors (see below), whose sum is σ = 165847365984304. Its totient is φ = 78559278624000.

The previous prime is 121112221211929. The next prime is 121112221212121. The reversal of 121112221212111 is 111212122211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121112221212111 - 2²⁹ = 121111684341199 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 (121112221212121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545550545890 + ... + 545550546111.

It is an arithmetic number, because the mean of its divisors is an integer number (20730920748038).

Almost surely, 2^{121112221212111} is an apocalyptic number.

121112221212111 is a deficient number, since it is larger than the sum of its proper divisors (44735144772193).

121112221212111 is a wasteful number, since it uses less digits than its factorization.

121112221212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091101092041.

The product of its digits is 64, while the sum is 21.

Adding to 121112221212111 its reverse (111212122211121), we get a palindrome (232324343423232).

The spelling of 121112221212111 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred eleven".