201212212210121 has 8 divisors (see below), whose sum is σ = 229956962574720. Its totient is φ = 172467499000608.

The previous prime is 201212212210081. The next prime is 201212212210157. The reversal of 201212212210121 is 121012212212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201212212210121 - 2⁶ = 201212212210057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201212212210093 and 201212212210102.

It is not an unprimeable number, because it can be changed into a prime (201212212210171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3487325 + ... + 20361381.

It is an arithmetic number, because the mean of its divisors is an integer number (28744620321840).

Almost surely, 2^{201212212210121} is an apocalyptic number.

It is an amenable number.

201212212210121 is a deficient number, since it is larger than the sum of its proper divisors (28744750364599).

201212212210121 is a wasteful number, since it uses less digits than its factorization.

201212212210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18577543.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212212210121 its reverse (121012212212102), we get a palindrome (322224424422223).

The spelling of 201212212210121 in words is "two hundred one trillion, two hundred twelve billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".