120001110001020 has 144 divisors (see below), whose sum is σ = 388702149937920. Its totient is φ = 29900165299200.

The previous prime is 120001110001009. The next prime is 120001110001021. The reversal of 120001110001020 is 20100011100021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120001110000993 and 120001110001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001110001021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370623961 + ... + 370947600.

It is an arithmetic number, because the mean of its divisors is an integer number (2699320485680).

Almost surely, 2^{120001110001020} is an apocalyptic number.

120001110001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120001110001020 is an abundant number, since it is smaller than the sum of its proper divisors (268701039936900).

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

120001110001020 is a wasteful number, since it uses less digits than its factorization.

120001110001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741571636 (or 741571631 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120001110001020 its reverse (20100011100021), we get a palindrome (140101121101041).

The spelling of 120001110001020 in words is "one hundred twenty trillion, one billion, one hundred ten million, one thousand, twenty".