12120211012 has 48 divisors (see below), whose sum is σ = 26213579392. Its totient is φ = 4774878720.

The previous prime is 12120210997. The next prime is 12120211021. The reversal of 12120211012 is 21011202121.

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

It is a junction number, because it is equal to n+sod(n) for n = 12120210983 and 12120211001.

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, 18643 + ... + 156805.

Almost surely, 2^12120211012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120211012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13106789696).

12120211012 is an abundant number, since it is smaller than the sum of its proper divisors (14093368380).

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

12120211012 is a wasteful number, since it uses less digits than its factorization.

12120211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138428 (or 138426 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12120211012 its reverse (21011202121), we get a palindrome (33131413133).

The spelling of 12120211012 in words is "twelve billion, one hundred twenty million, two hundred eleven thousand, twelve".