121011111120 has 80 divisors (see below), whose sum is σ = 378576126720. Its totient is φ = 31973571072.

The previous prime is 121011111119. The next prime is 121011111121. The reversal of 121011111120 is 21111110121.

It is an interprime number because it is at equal distance from previous prime (121011111119) and next prime (121011111121).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121011111096 and 121011111105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011111121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2286744 + ... + 2339063.

It is an arithmetic number, because the mean of its divisors is an integer number (4732201584).

Almost surely, 2^121011111120 is an apocalyptic number.

121011111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011111120 is an abundant number, since it is smaller than the sum of its proper divisors (257565015600).

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

121011111120 is a wasteful number, since it uses less digits than its factorization.

121011111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625932 (or 4625926 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121011111120 its reverse (21111110121), we get a palindrome (142122221241).

Subtracting from 121011111120 its reverse (21111110121), we obtain a palindrome (99900000999).

The spelling of 121011111120 in words is "one hundred twenty-one billion, eleven million, one hundred eleven thousand, one hundred twenty".