20000121000012 has 72 divisors (see below), whose sum is σ = 52306172755200. Its totient is φ = 6435958303488.

The previous prime is 20000120999939. The next prime is 20000121000037. The reversal of 20000121000012 is 21000012100002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20000120999958 and 20000121000003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6537064 + ... + 9095792.

It is an arithmetic number, because the mean of its divisors is an integer number (726474621600).

Almost surely, 2^{20000121000012} is an apocalyptic number.

It is an amenable number.

20000121000012 is an abundant number, since it is smaller than the sum of its proper divisors (32306051755188).

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

20000121000012 is a wasteful number, since it uses less digits than its factorization.

20000121000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566255 (or 2566250 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20000121000012 its reverse (21000012100002), we get a palindrome (41000133100014).

The spelling of 20000121000012 in words is "twenty trillion, one hundred twenty-one million, twelve", and thus it is an aban number.