1223136401 has 2 divisors, whose sum is σ = 1223136402. Its totient is φ = 1223136400.

The previous prime is 1223136379. The next prime is 1223136407. The reversal of 1223136401 is 1046313221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198890625 + 24245776 = 34625^2 + 4924^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223136401 - 2⁶ = 1223136337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223136407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611568200 + 611568201.

It is an arithmetic number, because the mean of its divisors is an integer number (611568201).

Almost surely, 2^1223136401 is an apocalyptic number.

It is an amenable number.

1223136401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223136401 is an equidigital number, since it uses as much as digits as its factorization.

1223136401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1223136401 is about 34973.3670240656. The cubic root of 1223136401 is about 1069.4446126388. Note that the first 3 decimals are identical.

Adding to 1223136401 its reverse (1046313221), we get a palindrome (2269449622).

The spelling of 1223136401 in words is "one billion, two hundred twenty-three million, one hundred thirty-six thousand, four hundred one".