1220021059 has 2 divisors, whose sum is σ = 1220021060. Its totient is φ = 1220021058.

The previous prime is 1220021029. The next prime is 1220021071. The reversal of 1220021059 is 9501200221.

It is a strong prime.

It is an emirp because it is prime and its reverse (9501200221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220021059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610010529 + 610010530.

It is an arithmetic number, because the mean of its divisors is an integer number (610010530).

Almost surely, 2^1220021059 is an apocalyptic number.

1220021059 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220021059 is an equidigital number, since it uses as much as digits as its factorization.

1220021059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1220021059 is about 34928.7998505531. The cubic root of 1220021059 is about 1068.5358782467.

The spelling of 1220021059 in words is "one billion, two hundred twenty million, twenty-one thousand, fifty-nine".