12100001020 has 48 divisors (see below), whose sum is σ = 25653817728. Its totient is φ = 4793705280.

The previous prime is 12100000987. The next prime is 12100001029. The reversal of 12100001020 is 2010000121.

It is a junction number, because it is equal to n+sod(n) for n = 12100000994 and 12100001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100001029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1428919 + ... + 1437361.

It is an arithmetic number, because the mean of its divisors is an integer number (534454536).

Almost surely, 2^12100001020 is an apocalyptic number.

12100001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12100001020 is an abundant number, since it is smaller than the sum of its proper divisors (13553816708).

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

12100001020 is a wasteful number, since it uses less digits than its factorization.

12100001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9130 (or 9128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 12100001020 its reverse (2010000121), we get a palindrome (14110001141).

The spelling of 12100001020 in words is "twelve billion, one hundred million, one thousand, twenty".