201211012120 has 64 divisors (see below), whose sum is σ = 457344921600. Its totient is φ = 79667091840.

The previous prime is 201211012117. The next prime is 201211012129. The reversal of 201211012120 is 21210112102.

It is a self number, because there is not a number n which added to its sum of digits gives 201211012120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211012129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533505 + ... + 1659535.

It is an arithmetic number, because the mean of its divisors is an integer number (7146014400).

Almost surely, 2^201211012120 is an apocalyptic number.

201211012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201211012120 is an abundant number, since it is smaller than the sum of its proper divisors (256133909480).

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

201211012120 is a wasteful number, since it uses less digits than its factorization.

201211012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126448 (or 126444 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201211012120 its reverse (21210112102), we get a palindrome (222421124222).

The spelling of 201211012120 in words is "two hundred one billion, two hundred eleven million, twelve thousand, one hundred twenty".