121111220342 has 24 divisors (see below), whose sum is σ = 211521320064. Its totient is φ = 51857012592.

The previous prime is 121111220341. The next prime is 121111220407. The reversal of 121111220342 is 243022111121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111220341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461933 + ... + 674984.

It is an arithmetic number, because the mean of its divisors is an integer number (8813388336).

Almost surely, 2^121111220342 is an apocalyptic number.

121111220342 is a deficient number, since it is larger than the sum of its proper divisors (90410099722).

121111220342 is a wasteful number, since it uses less digits than its factorization.

121111220342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138020 (or 1138013 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121111220342 its reverse (243022111121), we get a palindrome (364133331463).

The spelling of 121111220342 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, three hundred forty-two".