12001000111020 has 36 divisors (see below), whose sum is σ = 36403033670640. Its totient is φ = 3200266696224.

The previous prime is 12001000110973. The next prime is 12001000111033. The reversal of 12001000111020 is 2011100010021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 12001000110993 and 12001000111011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33336111240 + ... + 33336111599.

It is an arithmetic number, because the mean of its divisors is an integer number (1011195379740).

Almost surely, 2^{12001000111020} is an apocalyptic number.

12001000111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001000111020 is an abundant number, since it is smaller than the sum of its proper divisors (24402033559620).

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

12001000111020 is a wasteful number, since it uses less digits than its factorization.

12001000111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66672222854 (or 66672222849 counting only the distinct ones).

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

Adding to 12001000111020 its reverse (2011100010021), we get a palindrome (14012100121041).

The spelling of 12001000111020 in words is "twelve trillion, one billion, one hundred eleven thousand, twenty".