20101101210 has 64 divisors (see below), whose sum is σ = 54849548160. Its totient is φ = 5235632640.

The previous prime is 20101101203. The next prime is 20101101211. The reversal of 20101101210 is 1210110102.

It is a happy number.

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 = 20101101192 and 20101101201.

It is not an unprimeable number, because it can be changed into a prime (20101101211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 854071 + ... + 877290.

It is an arithmetic number, because the mean of its divisors is an integer number (857024190).

Almost surely, 2^20101101210 is an apocalyptic number.

20101101210 is an abundant number, since it is smaller than the sum of its proper divisors (34748446950).

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

20101101210 is a wasteful number, since it uses less digits than its factorization.

20101101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731420 (or 1731414 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20101101210 its reverse (1210110102), we get a palindrome (21311211312).

The spelling of 20101101210 in words is "twenty billion, one hundred one million, one hundred one thousand, two hundred ten".