201022021212 has 12 divisors (see below), whose sum is σ = 469051382856. Its totient is φ = 67007340400.

The previous prime is 201022021177. The next prime is 201022021219. The reversal of 201022021212 is 212120220102.

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 = 201022021191 and 201022021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022021219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8375917539 + ... + 8375917562.

It is an arithmetic number, because the mean of its divisors is an integer number (39087615238).

Almost surely, 2^201022021212 is an apocalyptic number.

It is an amenable number.

201022021212 is an abundant number, since it is smaller than the sum of its proper divisors (268029361644).

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

201022021212 is a wasteful number, since it uses less digits than its factorization.

201022021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16751835108 (or 16751835106 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201022021212 its reverse (212120220102), we get a palindrome (413142241314).

The spelling of 201022021212 in words is "two hundred one billion, twenty-two million, twenty-one thousand, two hundred twelve".