121121222221222 has 16 divisors (see below), whose sum is σ = 191276687654640. Its totient is φ = 57363414755328.

The previous prime is 121121222221193. The next prime is 121121222221231. The reversal of 121121222221222 is 222122222121121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271879243 + ... + 272324374.

It is an arithmetic number, because the mean of its divisors is an integer number (11954792978415).

Almost surely, 2^{121121222221222} is an apocalyptic number.

121121222221222 is a deficient number, since it is larger than the sum of its proper divisors (70155465433418).

121121222221222 is a wasteful number, since it uses less digits than its factorization.

121121222221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544209495.

The product of its digits is 1024, while the sum is 25.

Adding to 121121222221222 its reverse (222122222121121), we get a palindrome (343243444342343).

The spelling of 121121222221222 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".