201212001022120 has 256 divisors, whose sum is σ = 510577499520000. Its totient is φ = 70739470264320.

The previous prime is 201212001022033. The next prime is 201212001022129. The reversal of 201212001022120 is 21220100212102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201212001022094 and 201212001022103.

It is not an unprimeable number, because it can be changed into a prime (201212001022129) 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 63 ways as a sum of consecutive naturals, for example, 1076545636 + ... + 1076732524.

It is an arithmetic number, because the mean of its divisors is an integer number (1994443357500).

Almost surely, 2^{201212001022120} is an apocalyptic number.

201212001022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201212001022120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255288749760000).

201212001022120 is an abundant number, since it is smaller than the sum of its proper divisors (309365498497880).

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

201212001022120 is a wasteful number, since it uses less digits than its factorization.

201212001022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187656 (or 187652 counting only the distinct ones).

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

Adding to 201212001022120 its reverse (21220100212102), we get a palindrome (222432101234222).

The spelling of 201212001022120 in words is "two hundred one trillion, two hundred twelve billion, one million, twenty-two thousand, one hundred twenty".