201211201212 has 144 divisors (see below), whose sum is σ = 545304275712. Its totient is φ = 56562278400.

The previous prime is 201211201183. The next prime is 201211201267. The reversal of 201211201212 is 212102112102.

It is a junction number, because it is equal to n+sod(n) for n = 201211201191 and 201211201200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 334793712 + ... + 334794312.

It is an arithmetic number, because the mean of its divisors is an integer number (3786835248).

Almost surely, 2^201211201212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201211201212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272652137856).

201211201212 is an abundant number, since it is smaller than the sum of its proper divisors (344093074500).

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

201211201212 is a wasteful number, since it uses less digits than its factorization.

201211201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 913 counting only the distinct ones).

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

Adding to 201211201212 its reverse (212102112102), we get a palindrome (413313313314).

The spelling of 201211201212 in words is "two hundred one billion, two hundred eleven million, two hundred one thousand, two hundred twelve".