121122222120111 has 4 divisors (see below), whose sum is σ = 161496296160152. Its totient is φ = 80748148080072.

The previous prime is 121122222120079. The next prime is 121122222120113. The reversal of 121122222120111 is 111021222221121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121122222120111 - 2⁵ = 121122222120079 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 (121122222120113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20187037020016 + ... + 20187037020021.

It is an arithmetic number, because the mean of its divisors is an integer number (40374074040038).

Almost surely, 2^{121122222120111} is an apocalyptic number.

121122222120111 is a deficient number, since it is larger than the sum of its proper divisors (40374074040041).

121122222120111 is an equidigital number, since it uses as much as digits as its factorization.

121122222120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40374074040040.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121122222120111 its reverse (111021222221121), we get a palindrome (232143444341232).

The spelling of 121122222120111 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred eleven".