1216957701017 has 4 divisors (see below), whose sum is σ = 1216960354560. Its totient is φ = 1216955047476.

The previous prime is 1216957701013. The next prime is 1216957701041. The reversal of 1216957701017 is 7101077596121.

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 1216957701017 - 2² = 1216957701013 is a prime.

It is a super-3 number, since 3×1216957701017³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216957701013) 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, 442313 + ... + 1621590.

It is an arithmetic number, because the mean of its divisors is an integer number (304240088640).

Almost surely, 2^{1216957701017} is an apocalyptic number.

It is an amenable number.

1216957701017 is a deficient number, since it is larger than the sum of its proper divisors (2653543).

1216957701017 is an equidigital number, since it uses as much as digits as its factorization.

1216957701017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653542.

The product of its (nonzero) digits is 185220, while the sum is 47.

The spelling of 1216957701017 in words is "one trillion, two hundred sixteen billion, nine hundred fifty-seven million, seven hundred one thousand, seventeen".