121011000120120 has 256 divisors, whose sum is σ = 399386169262080. Its totient is φ = 29088206451200.

The previous prime is 121011000120089. The next prime is 121011000120167. The reversal of 121011000120120 is 21021000110121.

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 = 121011000120096 and 121011000120105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 211195057 + ... + 211767263.

It is an arithmetic number, because the mean of its divisors is an integer number (1560102223680).

Almost surely, 2^{121011000120120} is an apocalyptic number.

121011000120120 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 121011000120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199693084631040).

121011000120120 is an abundant number, since it is smaller than the sum of its proper divisors (278375169141960).

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

121011000120120 is a wasteful number, since it uses less digits than its factorization.

121011000120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573586 (or 573582 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121011000120120 its reverse (21021000110121), we get a palindrome (142032000230241).

Subtracting from 121011000120120 its reverse (21021000110121), we obtain a palindrome (99990000009999).

The spelling of 121011000120120 in words is "one hundred twenty-one trillion, eleven billion, one hundred twenty thousand, one hundred twenty".