202110121212 has 12 divisors (see below), whose sum is σ = 471590282856. Its totient is φ = 67370040400.

The previous prime is 202110121141. The next prime is 202110121217. The reversal of 202110121212 is 212121011202.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 202110121191 and 202110121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202110121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8421255039 + ... + 8421255062.

It is an arithmetic number, because the mean of its divisors is an integer number (39299190238).

Almost surely, 2^202110121212 is an apocalyptic number.

It is an amenable number.

202110121212 is an abundant number, since it is smaller than the sum of its proper divisors (269480161644).

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

202110121212 is a wasteful number, since it uses less digits than its factorization.

202110121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16842510108 (or 16842510106 counting only the distinct ones).

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

Adding to 202110121212 its reverse (212121011202), we get a palindrome (414231132414).

The spelling of 202110121212 in words is "two hundred two billion, one hundred ten million, one hundred twenty-one thousand, two hundred twelve".