12111022111020 has 96 divisors (see below), whose sum is σ = 40440282559488. Its totient is φ = 2647875639552.

The previous prime is 12111022110989. The next prime is 12111022111021. The reversal of 12111022111020 is 2011122011121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12111022111021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 626854839 + ... + 626874158.

It is an arithmetic number, because the mean of its divisors is an integer number (421252943328).

Almost surely, 2^{12111022111020} is an apocalyptic number.

12111022111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111022111020 is an abundant number, since it is smaller than the sum of its proper divisors (28329260448468).

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

12111022111020 is a wasteful number, since it uses less digits than its factorization.

12111022111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253729039 (or 1253729037 counting only the distinct ones).

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

Adding to 12111022111020 its reverse (2011122011121), we get a palindrome (14122144122141).

The spelling of 12111022111020 in words is "twelve trillion, one hundred eleven billion, twenty-two million, one hundred eleven thousand, twenty".