121000222111 has 4 divisors (see below), whose sum is σ = 121028049000. Its totient is φ = 120972395224.

The previous prime is 121000222081. The next prime is 121000222121. The reversal of 121000222111 is 111222000121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111222000121 = 12391 ⋅8976031.

It is a cyclic number.

It is not a de Polignac number, because 121000222111 - 2⁷ = 121000221983 is a prime.

It is a super-2 number, since 2×121000222111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000222091 and 121000222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000222121) 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, 13906921 + ... + 13915618.

It is an arithmetic number, because the mean of its divisors is an integer number (30257012250).

Almost surely, 2^121000222111 is an apocalyptic number.

121000222111 is a deficient number, since it is larger than the sum of its proper divisors (27826889).

121000222111 is an equidigital number, since it uses as much as digits as its factorization.

121000222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27826888.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121000222111 its reverse (111222000121), we get a palindrome (232222222232).

The spelling of 121000222111 in words is "one hundred twenty-one billion, two hundred twenty-two thousand, one hundred eleven".