20101311210 has 64 divisors (see below), whose sum is σ = 49151318400. Its totient is φ = 5259777792.

The previous prime is 20101311157. The next prime is 20101311229. The reversal of 20101311210 is 1211310102.

It is a super-2 number, since 2×20101311210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 975696 + ... + 996084.

It is an arithmetic number, because the mean of its divisors is an integer number (767989350).

Almost surely, 2^20101311210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101311210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24575659200).

20101311210 is an abundant number, since it is smaller than the sum of its proper divisors (29050007190).

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

20101311210 is a wasteful number, since it uses less digits than its factorization.

20101311210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21015.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20101311210 its reverse (1211310102), we get a palindrome (21312621312).

The spelling of 20101311210 in words is "twenty billion, one hundred one million, three hundred eleven thousand, two hundred ten".