1229221481 has 2 divisors, whose sum is σ = 1229221482. Its totient is φ = 1229221480.

The previous prime is 1229221471. The next prime is 1229221489. The reversal of 1229221481 is 1841229221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1096603225 + 132618256 = 33115^2 + 11516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1229221481 - 2¹⁰ = 1229220457 is a prime.

It is a super-2 number, since 2×1229221481² = 3021970898703666722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1229221489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614610740 + 614610741.

It is an arithmetic number, because the mean of its divisors is an integer number (614610741).

Almost surely, 2^1229221481 is an apocalyptic number.

It is an amenable number.

1229221481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229221481 is an equidigital number, since it uses as much as digits as its factorization.

1229221481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 1229221481 is about 35060.2550047771. The cubic root of 1229221481 is about 1071.2151684890.

The spelling of 1229221481 in words is "one billion, two hundred twenty-nine million, two hundred twenty-one thousand, four hundred eighty-one".