1229217401 has 2 divisors, whose sum is σ = 1229217402. Its totient is φ = 1229217400.

The previous prime is 1229217371. The next prime is 1229217427. The reversal of 1229217401 is 1047129221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1219755625 + 9461776 = 34925^2 + 3076^2 .

It is an emirp because it is prime and its reverse (1047129221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1229217401 - 2²² = 1225023097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1229217481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614608700 + 614608701.

It is an arithmetic number, because the mean of its divisors is an integer number (614608701).

Almost surely, 2^1229217401 is an apocalyptic number.

It is an amenable number.

1229217401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229217401 is an equidigital number, since it uses as much as digits as its factorization.

1229217401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 1229217401 is about 35060.1968191851. The cubic root of 1229217401 is about 1071.2139833045.

The spelling of 1229217401 in words is "one billion, two hundred twenty-nine million, two hundred seventeen thousand, four hundred one".