12011012020 has 24 divisors (see below), whose sum is σ = 28826429184. Its totient is φ = 4118061216.

The previous prime is 12011011997. The next prime is 12011012047. The reversal of 12011012020 is 2021011021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12011011988 and 12011012006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42896332 + ... + 42896611.

It is an arithmetic number, because the mean of its divisors is an integer number (1201101216).

Almost surely, 2^12011012020 is an apocalyptic number.

12011012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011012020 is an abundant number, since it is smaller than the sum of its proper divisors (16815417164).

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

12011012020 is a wasteful number, since it uses less digits than its factorization.

12011012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85792959 (or 85792957 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12011012020 its reverse (2021011021), we get a palindrome (14032023041).

Subtracting from 12011012020 its reverse (2021011021), we obtain a palindrome (9990000999).

The spelling of 12011012020 in words is "twelve billion, eleven million, twelve thousand, twenty".