1220122154509 has 2 divisors, whose sum is σ = 1220122154510. Its totient is φ = 1220122154508.

The previous prime is 1220122154501. The next prime is 1220122154579. The reversal of 1220122154509 is 9054512210221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1090416292900 + 129705861609 = 1044230^2 + 360147^2 .

It is an emirp because it is prime and its reverse (9054512210221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220122154509 - 2³ = 1220122154501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220122154501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610061077254 + 610061077255.

It is an arithmetic number, because the mean of its divisors is an integer number (610061077255).

Almost surely, 2^{1220122154509} is an apocalyptic number.

It is an amenable number.

1220122154509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220122154509 is an equidigital number, since it uses as much as digits as its factorization.

1220122154509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 1220122154509 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred fifty-four thousand, five hundred nine".