20101102020220 has 96 divisors (see below), whose sum is σ = 45835121203200. Its totient is φ = 7360650952704.

The previous prime is 20101102020149. The next prime is 20101102020227. The reversal of 20101102020220 is 2202020110102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20101102020220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101102020227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86032516 + ... + 86265844.

It is an arithmetic number, because the mean of its divisors is an integer number (477449179200).

Almost surely, 2^{20101102020220} is an apocalyptic number.

20101102020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101102020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22917560601600).

20101102020220 is an abundant number, since it is smaller than the sum of its proper divisors (25734019182980).

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

20101102020220 is a wasteful number, since it uses less digits than its factorization.

20101102020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236087 (or 236085 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20101102020220 its reverse (2202020110102), we get a palindrome (22303122130322).

The spelling of 20101102020220 in words is "twenty trillion, one hundred one billion, one hundred two million, twenty thousand, two hundred twenty".