1221233001139 has 2 divisors, whose sum is σ = 1221233001140. Its totient is φ = 1221233001138.

The previous prime is 1221233001101. The next prime is 1221233001143. The reversal of 1221233001139 is 9311003321221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221233001139 - 2³⁷ = 1083794047667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221233001169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610616500569 + 610616500570.

It is an arithmetic number, because the mean of its divisors is an integer number (610616500570).

Almost surely, 2^{1221233001139} is an apocalyptic number.

1221233001139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221233001139 is an equidigital number, since it uses as much as digits as its factorization.

1221233001139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 1221233001139 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-three million, one thousand, one hundred thirty-nine".