1220217542069 has 2 divisors, whose sum is σ = 1220217542070. Its totient is φ = 1220217542068.

The previous prime is 1220217542051. The next prime is 1220217542153. The reversal of 1220217542069 is 9602457120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1095032487844 + 125185054225 = 1046438^2 + 353815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220217542069 - 2⁸ = 1220217541813 is a prime.

It is a super-2 number, since 2×1220217542069² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220217542039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610108771034 + 610108771035.

It is an arithmetic number, because the mean of its divisors is an integer number (610108771035).

Almost surely, 2^{1220217542069} is an apocalyptic number.

It is an amenable number.

1220217542069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220217542069 is an equidigital number, since it uses as much as digits as its factorization.

1220217542069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 1220217542069 in words is "one trillion, two hundred twenty billion, two hundred seventeen million, five hundred forty-two thousand, sixty-nine".