1220505499 has 2 divisors, whose sum is σ = 1220505500. Its totient is φ = 1220505498.

The previous prime is 1220505487. The next prime is 1220505509. The reversal of 1220505499 is 9945050221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220505499 - 2⁵ = 1220505467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220505479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610252749 + 610252750.

It is an arithmetic number, because the mean of its divisors is an integer number (610252750).

Almost surely, 2^1220505499 is an apocalyptic number.

1220505499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220505499 is an equidigital number, since it uses as much as digits as its factorization.

1220505499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1220505499 is about 34935.7338408684. The cubic root of 1220505499 is about 1068.6772891997.

The spelling of 1220505499 in words is "one billion, two hundred twenty million, five hundred five thousand, four hundred ninety-nine".