1220209967 has 2 divisors, whose sum is σ = 1220209968. Its totient is φ = 1220209966.

The previous prime is 1220209943. The next prime is 1220209973. The reversal of 1220209967 is 7699020221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220209967 - 2¹² = 1220205871 is a prime.

It is a super-2 number, since 2×1220209967² = 2977824727132282178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220209967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220209567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610104983 + 610104984.

It is an arithmetic number, because the mean of its divisors is an integer number (610104984).

Almost surely, 2^1220209967 is an apocalyptic number.

1220209967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220209967 is an equidigital number, since it uses as much as digits as its factorization.

1220209967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1220209967 is about 34931.5039326966. The cubic root of 1220209967 is about 1068.5910260812.

The spelling of 1220209967 in words is "one billion, two hundred twenty million, two hundred nine thousand, nine hundred sixty-seven".