20101101210100 has 36 divisors (see below), whose sum is σ = 43620387609568. Its totient is φ = 8040256524000.

The previous prime is 20101101210067. The next prime is 20101101210101. The reversal of 20101101210100 is 101210110102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101101210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2135665 + ... + 6690535.

Almost surely, 2^{20101101210100} is an apocalyptic number.

20101101210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101101210100 is an abundant number, since it is smaller than the sum of its proper divisors (23519286399468).

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

20101101210100 is a wasteful number, since it uses less digits than its factorization.

20101101210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599016 (or 4599009 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20101101210100 its reverse (101210110102), we get a palindrome (20202311320202).

The spelling of 20101101210100 in words is "twenty trillion, one hundred one billion, one hundred one million, two hundred ten thousand, one hundred".