1220202979 has 2 divisors, whose sum is σ = 1220202980. Its totient is φ = 1220202978.

The previous prime is 1220202961. The next prime is 1220203027. The reversal of 1220202979 is 9792020221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9792020221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220202979 - 2¹¹ = 1220200931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220202079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610101489 + 610101490.

It is an arithmetic number, because the mean of its divisors is an integer number (610101490).

Almost surely, 2^1220202979 is an apocalyptic number.

1220202979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220202979 is an equidigital number, since it uses as much as digits as its factorization.

1220202979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1220202979 is about 34931.4039082313. The cubic root of 1220202979 is about 1068.5889861786.

The spelling of 1220202979 in words is "one billion, two hundred twenty million, two hundred two thousand, nine hundred seventy-nine".