1212101302221 has 8 divisors (see below), whose sum is σ = 1795705632960. Its totient is φ = 808067534796.

The previous prime is 1212101302193. The next prime is 1212101302249. The reversal of 1212101302221 is 1222031012121.

1212101302221 is a `hidden beast` number, since 121 + 21 + 0 + 1 + 302 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (1212101302193) and next prime (1212101302249).

It is not a de Polignac number, because 1212101302221 - 2⁶ = 1212101302157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212101302194 and 1212101302203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212101352221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22446320385 + ... + 22446320438.

It is an arithmetic number, because the mean of its divisors is an integer number (224463204120).

Almost surely, 2^{1212101302221} is an apocalyptic number.

It is an amenable number.

1212101302221 is a deficient number, since it is larger than the sum of its proper divisors (583604330739).

1212101302221 is an equidigital number, since it uses as much as digits as its factorization.

1212101302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44892640832 (or 44892640826 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1212101302221 its reverse (1222031012121), we get a palindrome (2434132314342).

The spelling of 1212101302221 in words is "one trillion, two hundred twelve billion, one hundred one million, three hundred two thousand, two hundred twenty-one".