1215067072217 has 4 divisors (see below), whose sum is σ = 1254262784256. Its totient is φ = 1175871360180.

The previous prime is 1215067072199. The next prime is 1215067072283. The reversal of 1215067072217 is 7122707605121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1215067072217 - 2²² = 1215062877913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215067078217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19597855973 + ... + 19597856034.

It is an arithmetic number, because the mean of its divisors is an integer number (313565696064).

Almost surely, 2^{1215067072217} is an apocalyptic number.

It is an amenable number.

1215067072217 is a deficient number, since it is larger than the sum of its proper divisors (39195712039).

1215067072217 is an equidigital number, since it uses as much as digits as its factorization.

1215067072217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39195712038.

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 1215067072217 in words is "one trillion, two hundred fifteen billion, sixty-seven million, seventy-two thousand, two hundred seventeen".