20010001020102 has 48 divisors (see below), whose sum is σ = 43562931611472. Its totient is φ = 6638054184000.

The previous prime is 20010001020101. The next prime is 20010001020109. The reversal of 20010001020102 is 20102010001002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010001020101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3798568 + ... + 7378964.

It is an arithmetic number, because the mean of its divisors is an integer number (907561075239).

Almost surely, 2^{20010001020102} is an apocalyptic number.

20010001020102 is an abundant number, since it is smaller than the sum of its proper divisors (23552930591370).

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

20010001020102 is a wasteful number, since it uses less digits than its factorization.

20010001020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581893 (or 3581890 counting only the distinct ones).

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

Adding to 20010001020102 its reverse (20102010001002), we get a palindrome (40112011021104).

The spelling of 20010001020102 in words is "twenty trillion, ten billion, one million, twenty thousand, one hundred two".