12120021020100 has 144 divisors (see below), whose sum is σ = 40298289938816. Its totient is φ = 2754984960000.

The previous prime is 12120021020087. The next prime is 12120021020153. The reversal of 12120021020100 is 102012002121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15563101 + ... + 16323300.

Almost surely, 2^{12120021020100} is an apocalyptic number.

12120021020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120021020100 is an abundant number, since it is smaller than the sum of its proper divisors (28178268918716).

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

12120021020100 is a wasteful number, since it uses less digits than its factorization.

12120021020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31886606 (or 31886599 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12120021020100 its reverse (102012002121), we get a palindrome (12222033022221).

The spelling of 12120021020100 in words is "twelve trillion, one hundred twenty billion, twenty-one million, twenty thousand, one hundred".