20010101020100 has 36 divisors (see below), whose sum is σ = 43422115772868. Its totient is φ = 8004004176000.

The previous prime is 20010101020051. The next prime is 20010101020139. The reversal of 20010101020100 is 102010101002.

It can be written as a sum of positive squares in 6 ways, for example, as 7994948521156 + 12015152498944 = 2827534^2 + 3466288^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37944230 + ... + 38467970.

Almost surely, 2^{20010101020100} is an apocalyptic number.

20010101020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010101020100 is an abundant number, since it is smaller than the sum of its proper divisors (23412014752768).

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

20010101020100 is a wasteful number, since it uses less digits than its factorization.

20010101020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905816 (or 905809 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20010101020100 its reverse (102010101002), we get a palindrome (20112111121102).

The spelling of 20010101020100 in words is "twenty trillion, ten billion, one hundred one million, twenty thousand, one hundred".