212121012201 has 16 divisors (see below), whose sum is σ = 329828592000. Its totient is φ = 121212006384.

The previous prime is 212121012163. The next prime is 212121012221. The reversal of 212121012201 is 102210121212.

It is not a de Polignac number, because 212121012201 - 2¹⁴ = 212120995817 is a prime.

It is a super-3 number, since 3×212121012201³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (212121012221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103070406 + ... + 103072463.

It is an arithmetic number, because the mean of its divisors is an integer number (20614287000).

Almost surely, 2^212121012201 is an apocalyptic number.

212121012201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212121012201 is a deficient number, since it is larger than the sum of its proper divisors (117707579799).

212121012201 is an equidigital number, since it uses as much as digits as its factorization.

212121012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206142893 (or 206142879 counting only the distinct ones).

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

Adding to 212121012201 its reverse (102210121212), we get a palindrome (314331133413).

The spelling of 212121012201 in words is "two hundred twelve billion, one hundred twenty-one million, twelve thousand, two hundred one".