12011111210020 has 48 divisors (see below), whose sum is σ = 27741538718208. Its totient is φ = 4340512851840.

The previous prime is 12011111209987. The next prime is 12011111210041. The reversal of 12011111210020 is 2001211111021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491440776 + ... + 491465215.

It is an arithmetic number, because the mean of its divisors is an integer number (577948723296).

Almost surely, 2^{12011111210020} is an apocalyptic number.

12011111210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011111210020 is an abundant number, since it is smaller than the sum of its proper divisors (15730427508188).

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

12011111210020 is a wasteful number, since it uses less digits than its factorization.

12011111210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982906060 (or 982906058 counting only the distinct ones).

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

Adding to 12011111210020 its reverse (2001211111021), we get a palindrome (14012322321041).

The spelling of 12011111210020 in words is "twelve trillion, eleven billion, one hundred eleven million, two hundred ten thousand, twenty".