120121211220 has 192 divisors, whose sum is σ = 347401764864. Its totient is φ = 30994467840.

The previous prime is 120121211167. The next prime is 120121211317. The reversal of 120121211220 is 22112121021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 120121211220.

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, 161670169 + ... + 161670911.

It is an arithmetic number, because the mean of its divisors is an integer number (1809384192).

Almost surely, 2^120121211220 is an apocalyptic number.

120121211220 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 120121211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173700882432).

120121211220 is an abundant number, since it is smaller than the sum of its proper divisors (227280553644).

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

120121211220 is a wasteful number, since it uses less digits than its factorization.

120121211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120121211220 its reverse (22112121021), we get a palindrome (142233332241).

The spelling of 120121211220 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty".