121122111110 has 64 divisors (see below), whose sum is σ = 292725909504. Its totient is φ = 34848316800.

The previous prime is 121122111079. The next prime is 121122111157. The reversal of 121122111110 is 11111221121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6040046 + ... + 6060065.

It is an arithmetic number, because the mean of its divisors is an integer number (4573842336).

Almost surely, 2^121122111110 is an apocalyptic number.

121122111110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121122111110 is an abundant number, since it is smaller than the sum of its proper divisors (171603798394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121122111110 is a wasteful number, since it uses less digits than its factorization.

121122111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12100149.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121122111110 its reverse (11111221121), we get a palindrome (132233332231).

It can be divided in two parts, 1211221111 and 10, that added together give a palindrome (1211221121).

The spelling of 121122111110 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred ten".