121111012222 has 4 divisors (see below), whose sum is σ = 181666518336. Its totient is φ = 60555506110.

The previous prime is 121111012193. The next prime is 121111012223. The reversal of 121111012222 is 222210111121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222210111121 = 12227 ⋅18173723.

It is a junction number, because it is equal to n+sod(n) for n = 121111012196 and 121111012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111012223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30277753054 + ... + 30277753057.

It is an arithmetic number, because the mean of its divisors is an integer number (45416629584).

Almost surely, 2^121111012222 is an apocalyptic number.

121111012222 is a deficient number, since it is larger than the sum of its proper divisors (60555506114).

121111012222 is an equidigital number, since it uses as much as digits as its factorization.

121111012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60555506113.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121111012222 its reverse (222210111121), we get a palindrome (343321123343).

The spelling of 121111012222 in words is "one hundred twenty-one billion, one hundred eleven million, twelve thousand, two hundred twenty-two".