121011101010120 has 128 divisors (see below), whose sum is σ = 364335675264000. Its totient is φ = 32153872783104.

The previous prime is 121011101010109. The next prime is 121011101010131. The reversal of 121011101010120 is 21010101110121.

It is an interprime number because it is at equal distance from previous prime (121011101010109) and next prime (121011101010131).

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 = 121011101010096 and 121011101010105.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 709644789 + ... + 709815291.

It is an arithmetic number, because the mean of its divisors is an integer number (2846372463000).

Almost surely, 2^{121011101010120} is an apocalyptic number.

121011101010120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121011101010120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182167837632000).

121011101010120 is an abundant number, since it is smaller than the sum of its proper divisors (243324574253880).

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

121011101010120 is a wasteful number, since it uses less digits than its factorization.

121011101010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191699 (or 191695 counting only the distinct ones).

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

Adding to 121011101010120 its reverse (21010101110121), we get a palindrome (142021202120241).

The spelling of 121011101010120 in words is "one hundred twenty-one trillion, eleven billion, one hundred one million, ten thousand, one hundred twenty".