201212202220 has 24 divisors (see below), whose sum is σ = 432372268944. Its totient is φ = 78613139136.

The previous prime is 201212202211. The next prime is 201212202241. The reversal of 201212202220 is 22202212102.

It is a junction number, because it is equal to n+sod(n) for n = 201212202194 and 201212202203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116982979 + ... + 116984698.

It is an arithmetic number, because the mean of its divisors is an integer number (18015511206).

Almost surely, 2^201212202220 is an apocalyptic number.

201212202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212202220 is an abundant number, since it is smaller than the sum of its proper divisors (231160066724).

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

201212202220 is a wasteful number, since it uses less digits than its factorization.

201212202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233967729 (or 233967727 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 201212202220 its reverse (22202212102), we get a palindrome (223414414322).

The spelling of 201212202220 in words is "two hundred one billion, two hundred twelve million, two hundred two thousand, two hundred twenty".