1217220160051 has 16 divisors (see below), whose sum is σ = 1391962015744. Its totient is φ = 1042691854464.

The previous prime is 1217220160049. The next prime is 1217220160061. The reversal of 1217220160051 is 1500610227121.

It is a cyclic number.

It is not a de Polignac number, because 1217220160051 - 2¹ = 1217220160049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217220160061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103649086 + ... + 103660828.

It is an arithmetic number, because the mean of its divisors is an integer number (86997625984).

Almost surely, 2^{1217220160051} is an apocalyptic number.

1217220160051 is a deficient number, since it is larger than the sum of its proper divisors (174741855693).

1217220160051 is a wasteful number, since it uses less digits than its factorization.

1217220160051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19570.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 1217220160051 its reverse (1500610227121), we get a palindrome (2717830387172).

The spelling of 1217220160051 in words is "one trillion, two hundred seventeen billion, two hundred twenty million, one hundred sixty thousand, fifty-one".