20101020212 has 108 divisors (see below), whose sum is σ = 45094192416. Its totient is φ = 7676323200.

The previous prime is 20101020139. The next prime is 20101020257. The reversal of 20101020212 is 21202010102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20101020193 and 20101020202.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 3977087 + ... + 3982137.

Almost surely, 2^20101020212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101020212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22547096208).

20101020212 is an abundant number, since it is smaller than the sum of its proper divisors (24993172204).

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

20101020212 is a wasteful number, since it uses less digits than its factorization.

20101020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146 (or 5102 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20101020212 its reverse (21202010102), we get a palindrome (41303030314).

The spelling of 20101020212 in words is "twenty billion, one hundred one million, twenty thousand, two hundred twelve".