121111122222110 has 8 divisors (see below), whose sum is σ = 218000019999816. Its totient is φ = 48444448888840.

The previous prime is 121111122222061. The next prime is 121111122222119. The reversal of 121111122222110 is 11222221111121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111122222119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6055556111096 + ... + 6055556111115.

It is an arithmetic number, because the mean of its divisors is an integer number (27250002499977).

Almost surely, 2^{121111122222110} is an apocalyptic number.

121111122222110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111122222110 is a deficient number, since it is larger than the sum of its proper divisors (96888897777706).

121111122222110 is a wasteful number, since it uses less digits than its factorization.

121111122222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111112222218.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121111122222110 its reverse (11222221111121), we get a palindrome (132333343333231).

It can be divided in two parts, 121111 and 122222110, that added together give a palindrome (122343221).

The spelling of 121111122222110 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred ten".