201121220212 has 36 divisors (see below), whose sum is σ = 391340126016. Its totient is φ = 89693799520.

The previous prime is 201121220189. The next prime is 201121220213. The reversal of 201121220212 is 212022121102.

It is a happy number.

201121220212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 690028 + ... + 937219.

It is an arithmetic number, because the mean of its divisors is an integer number (10870559056).

Almost surely, 2^201121220212 is an apocalyptic number.

201121220212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201121220212 is a deficient number, since it is larger than the sum of its proper divisors (190218905804).

201121220212 is a wasteful number, since it uses less digits than its factorization.

201121220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627368 (or 1627313 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201121220212 its reverse (212022121102), we get a palindrome (413143341314).

The spelling of 201121220212 in words is "two hundred one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twelve".