201212121202120 has 64 divisors (see below), whose sum is σ = 517404109017600. Its totient is φ = 68986811431680.

The previous prime is 201212121202091. The next prime is 201212121202133. The reversal of 201212121202120 is 21202121212102.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 119730465 + ... + 121399375.

It is an arithmetic number, because the mean of its divisors is an integer number (8084439203400).

Almost surely, 2^{201212121202120} is an apocalyptic number.

201212121202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201212121202120 is an abundant number, since it is smaller than the sum of its proper divisors (316191987815480).

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

201212121202120 is a wasteful number, since it uses less digits than its factorization.

201212121202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099518 (or 2099514 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201212121202120 its reverse (21202121212102), we get a palindrome (222414242414222).

The spelling of 201212121202120 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred two thousand, one hundred twenty".