20010100020012 has 120 divisors (see below), whose sum is σ = 55097401768640. Its totient is φ = 6315091970400.

The previous prime is 20010100020007. The next prime is 20010100020017. The reversal of 20010100020012 is 21002000101002.

It is an interprime number because it is at equal distance from previous prime (20010100020007) and next prime (20010100020017).

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 = 20010100019976 and 20010100020003.

It is not an unprimeable number, because it can be changed into a prime (20010100020017) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9016887 + ... + 11014737.

Almost surely, 2^{20010100020012} 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 20010100020012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27548700884320).

20010100020012 is an abundant number, since it is smaller than the sum of its proper divisors (35087301748628).

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

20010100020012 is a wasteful number, since it uses less digits than its factorization.

20010100020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999513 (or 1999502 counting only the distinct ones).

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

Adding to 20010100020012 its reverse (21002000101002), we get a palindrome (41012100121014).

The spelling of 20010100020012 in words is "twenty trillion, ten billion, one hundred million, twenty thousand, twelve".