121989011110 has 16 divisors (see below), whose sum is σ = 219960785376. Its totient is φ = 48711034368.

The previous prime is 121989011107. The next prime is 121989011129. The reversal of 121989011110 is 11110989121.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 10565202 + ... + 10576741.

It is an arithmetic number, because the mean of its divisors is an integer number (13747549086).

Almost surely, 2^121989011110 is an apocalyptic number.

121989011110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121989011110 is a deficient number, since it is larger than the sum of its proper divisors (97971774266).

121989011110 is a wasteful number, since it uses less digits than its factorization.

121989011110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21142527.

The product of its (nonzero) digits is 1296, while the sum is 34.

It can be divided in two parts, 121989011 and 110, that added together give a palindrome (121989121).

The spelling of 121989011110 in words is "one hundred twenty-one billion, nine hundred eighty-nine million, eleven thousand, one hundred ten".