1212101220321 has 24 divisors (see below), whose sum is σ = 1755911664000. Its totient is φ = 805714765632.

The previous prime is 1212101220307. The next prime is 1212101220347. The reversal of 1212101220321 is 1230221012121.

1212101220321 is a `hidden beast` number, since 1 + 2 + 121 + 0 + 1 + 220 + 321 = 666.

It is not a de Polignac number, because 1212101220321 - 2⁶ = 1212101220257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212101220294 and 1212101220303.

It is not an unprimeable number, because it can be changed into a prime (1212101220221) 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 23 ways as a sum of consecutive naturals, for example, 32417325 + ... + 32454693.

It is an arithmetic number, because the mean of its divisors is an integer number (73162986000).

Almost surely, 2^{1212101220321} is an apocalyptic number.

It is an amenable number.

1212101220321 is a deficient number, since it is larger than the sum of its proper divisors (543810443679).

1212101220321 is a wasteful number, since it uses less digits than its factorization.

1212101220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47773 (or 47770 counting only the distinct ones).

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

Adding to 1212101220321 its reverse (1230221012121), we get a palindrome (2442322232442).

The spelling of 1212101220321 in words is "one trillion, two hundred twelve billion, one hundred one million, two hundred twenty thousand, three hundred twenty-one".