1220711071 has 2 divisors, whose sum is σ = 1220711072. Its totient is φ = 1220711070.

The previous prime is 1220711059. The next prime is 1220711111. The reversal of 1220711071 is 1701170221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1701170221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220711071 - 2¹¹ = 1220709023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220712071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610355535 + 610355536.

It is an arithmetic number, because the mean of its divisors is an integer number (610355536).

Almost surely, 2^1220711071 is an apocalyptic number.

1220711071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220711071 is an equidigital number, since it uses as much as digits as its factorization.

1220711071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 22.

The square root of 1220711071 is about 34938.6758621445. The cubic root of 1220711071 is about 1068.7372855959.

Adding to 1220711071 its reverse (1701170221), we get a palindrome (2921881292).

The spelling of 1220711071 in words is "one billion, two hundred twenty million, seven hundred eleven thousand, seventy-one".