12001211020 has 12 divisors (see below), whose sum is σ = 25202543184. Its totient is φ = 4800484400.

The previous prime is 12001210999. The next prime is 12001211021. The reversal of 12001211020 is 2011210021.

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 = 12001210988 and 12001211006.

It is not an unprimeable number, because it can be changed into a prime (12001211021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300030256 + ... + 300030295.

It is an arithmetic number, because the mean of its divisors is an integer number (2100211932).

Almost surely, 2^12001211020 is an apocalyptic number.

12001211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001211020 is an abundant number, since it is smaller than the sum of its proper divisors (13201332164).

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

12001211020 is a wasteful number, since it uses less digits than its factorization.

12001211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600060560 (or 600060558 counting only the distinct ones).

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

Adding to 12001211020 its reverse (2011210021), we get a palindrome (14012421041).

Subtracting from 12001211020 its reverse (2011210021), we obtain a palindrome (9990000999).

The spelling of 12001211020 in words is "twelve billion, one million, two hundred eleven thousand, twenty".