12001011020 has 36 divisors (see below), whose sum is σ = 25749842160. Its totient is φ = 4698250848.

The previous prime is 12001011019. The next prime is 12001011023. The reversal of 12001011020 is 2011010021.

It is a super-2 number, since 2×12001011020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12001010989 and 12001011007.

It is not an unprimeable number, because it can be changed into a prime (12001011023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91640 + ... + 179999.

Almost surely, 2^12001011020 is an apocalyptic number.

12001011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001011020 is an abundant number, since it is smaller than the sum of its proper divisors (13748831140).

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

12001011020 is a wasteful number, since it uses less digits than its factorization.

12001011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271742 (or 271693 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12001011020 its reverse (2011010021), we get a palindrome (14012021041).

Subtracting from 12001011020 its reverse (2011010021), we obtain a palindrome (9990000999).

The spelling of 12001011020 in words is "twelve billion, one million, eleven thousand, twenty".