121112111222222 has 16 divisors (see below), whose sum is σ = 188315341182000. Its totient is φ = 58348836490560.

The previous prime is 121112111222213. The next prime is 121112111222233. The reversal of 121112111222222 is 222222111211121.

It is a super-2 number, since 2×121112111222222² (a number of 29 digits) contains 22 as substring.

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, 2126386847 + ... + 2126443802.

It is an arithmetic number, because the mean of its divisors is an integer number (11769708823875).

Almost surely, 2^{121112111222222} is an apocalyptic number.

121112111222222 is a deficient number, since it is larger than the sum of its proper divisors (67203229959778).

121112111222222 is a wasteful number, since it uses less digits than its factorization.

121112111222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252831171.

The product of its digits is 256, while the sum is 23.

Adding to 121112111222222 its reverse (222222111211121), we get a palindrome (343334222433343).

The spelling of 121112111222222 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".