1221155160227 has 2 divisors, whose sum is σ = 1221155160228. Its totient is φ = 1221155160226.

The previous prime is 1221155160217. The next prime is 1221155160353. The reversal of 1221155160227 is 7220615511221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221155160227 - 2³² = 1216860192931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221155160217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610577580113 + 610577580114.

It is an arithmetic number, because the mean of its divisors is an integer number (610577580114).

Almost surely, 2^{1221155160227} is an apocalyptic number.

1221155160227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221155160227 is an equidigital number, since it uses as much as digits as its factorization.

1221155160227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 1221155160227 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-five million, one hundred sixty thousand, two hundred twenty-seven".