1215222011213 has 8 divisors (see below), whose sum is σ = 1393732667328. Its totient is φ = 1037938233024.

The previous prime is 1215222011177. The next prime is 1215222011243. The reversal of 1215222011213 is 3121102225121.

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

It is not a de Polignac number, because 1215222011213 - 2¹⁴ = 1215221994829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215222011243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 306717356 + ... + 306721317.

It is an arithmetic number, because the mean of its divisors is an integer number (174216583416).

Almost surely, 2^{1215222011213} is an apocalyptic number.

It is an amenable number.

1215222011213 is a deficient number, since it is larger than the sum of its proper divisors (178510656115).

1215222011213 is an equidigital number, since it uses as much as digits as its factorization.

1215222011213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613438963.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1215222011213 its reverse (3121102225121), we get a palindrome (4336324236334).

The spelling of 1215222011213 in words is "one trillion, two hundred fifteen billion, two hundred twenty-two million, eleven thousand, two hundred thirteen".