120001111121020 has 48 divisors (see below), whose sum is σ = 252212492242368. Its totient is φ = 47960419020800.

The previous prime is 120001111120997. The next prime is 120001111121027. The reversal of 120001111121020 is 20121111100021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001111121027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421199457 + ... + 421484263.

It is an arithmetic number, because the mean of its divisors is an integer number (5254426921716).

Almost surely, 2^{120001111121020} is an apocalyptic number.

120001111121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120001111121020 is an abundant number, since it is smaller than the sum of its proper divisors (132211381121348).

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

120001111121020 is a wasteful number, since it uses less digits than its factorization.

120001111121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302310 (or 302308 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120001111121020 its reverse (20121111100021), we get a palindrome (140122222221041).

The spelling of 120001111121020 in words is "one hundred twenty trillion, one billion, one hundred eleven million, one hundred twenty-one thousand, twenty".