2021210101212 has 48 divisors (see below), whose sum is σ = 4998527442720. Its totient is φ = 633476616192.

The previous prime is 2021210101177. The next prime is 2021210101217. The reversal of 2021210101212 is 2121010121202.

It is a junction number, because it is equal to n+sod(n) for n = 2021210101191 and 2021210101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021210101217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4703923 + ... + 5115594.

It is an arithmetic number, because the mean of its divisors is an integer number (104135988390).

Almost surely, 2^{2021210101212} is an apocalyptic number.

It is an amenable number.

2021210101212 is an abundant number, since it is smaller than the sum of its proper divisors (2977317341508).

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

2021210101212 is a wasteful number, since it uses less digits than its factorization.

2021210101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820550 (or 9820548 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2021210101212 its reverse (2121010121202), we get a palindrome (4142220222414).

The spelling of 2021210101212 in words is "two trillion, twenty-one billion, two hundred ten million, one hundred one thousand, two hundred twelve".