21002012000120 has 16 divisors (see below), whose sum is σ = 47254527000360. Its totient is φ = 8400804800032.

The previous prime is 21002012000117. The next prime is 21002012000143. The reversal of 21002012000120 is 2100021020012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262525149962 + ... + 262525150041.

Almost surely, 2^{21002012000120} is an apocalyptic number.

21002012000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002012000120 is an abundant number, since it is smaller than the sum of its proper divisors (26252515000240).

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

21002012000120 is a wasteful number, since it uses less digits than its factorization.

21002012000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525050300014 (or 525050300010 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21002012000120 its reverse (2100021020012), we get a palindrome (23102033020132).

The spelling of 21002012000120 in words is "twenty-one trillion, two billion, twelve million, one hundred twenty", and thus it is an aban number.