1226131139 has 2 divisors, whose sum is σ = 1226131140. Its totient is φ = 1226131138.

The previous prime is 1226131133. The next prime is 1226131147. The reversal of 1226131139 is 9311316221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1226131139 - 2²⁴ = 1209353923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226131133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613065569 + 613065570.

It is an arithmetic number, because the mean of its divisors is an integer number (613065570).

Almost surely, 2^1226131139 is an apocalyptic number.

1226131139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226131139 is an equidigital number, since it uses as much as digits as its factorization.

1226131139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 1226131139 is about 35016.1554000436. The cubic root of 1226131139 is about 1070.3167138267.

The spelling of 1226131139 in words is "one billion, two hundred twenty-six million, one hundred thirty-one thousand, one hundred thirty-nine".