1220021107 has 2 divisors, whose sum is σ = 1220021108. Its totient is φ = 1220021106.

The previous prime is 1220021083. The next prime is 1220021113. The reversal of 1220021107 is 7011200221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220021107 - 2⁷ = 1220020979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220021137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610010553 + 610010554.

It is an arithmetic number, because the mean of its divisors is an integer number (610010554).

Almost surely, 2^1220021107 is an apocalyptic number.

1220021107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220021107 is an equidigital number, since it uses as much as digits as its factorization.

1220021107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1220021107 is about 34928.8005376652. The cubic root of 1220021107 is about 1068.5358922601.

Adding to 1220021107 its reverse (7011200221), we get a palindrome (8231221328).

The spelling of 1220021107 in words is "one billion, two hundred twenty million, twenty-one thousand, one hundred seven".