120001111121220 has 72 divisors (see below), whose sum is σ = 390860761947264. Its totient is φ = 27428825398464.

The previous prime is 120001111121201. The next prime is 120001111121257. The reversal of 120001111121220 is 22121111100021.

It is a happy number.

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 120001111121220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20408349292 + ... + 20408355171.

It is an arithmetic number, because the mean of its divisors is an integer number (5428621693712).

Almost surely, 2^{120001111121220} is an apocalyptic number.

120001111121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120001111121220 is an abundant number, since it is smaller than the sum of its proper divisors (270859650826044).

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

120001111121220 is a wasteful number, since it uses less digits than its factorization.

120001111121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40816704489 (or 40816704480 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 120001111121220 its reverse (22121111100021), we get a palindrome (142122222221241).

The spelling of 120001111121220 in words is "one hundred twenty trillion, one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty".