121123231110 has 96 divisors (see below), whose sum is σ = 360118317312. Its totient is φ = 27669211200.

The previous prime is 121123231069. The next prime is 121123231111. The reversal of 121123231110 is 11132321121.

121123231110 is a `hidden beast` number, since 121 + 1 + 232 + 311 + 1 + 0 = 666.

It is a super-2 number, since 2×121123231110² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123231111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1045585 + ... + 1155635.

It is an arithmetic number, because the mean of its divisors is an integer number (3751232472).

Almost surely, 2^121123231110 is an apocalyptic number.

121123231110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121123231110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180059158656).

121123231110 is an abundant number, since it is smaller than the sum of its proper divisors (238995086202).

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

121123231110 is a wasteful number, since it uses less digits than its factorization.

121123231110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111818 (or 111815 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121123231110 its reverse (11132321121), we get a palindrome (132255552231).

The spelling of 121123231110 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred ten".