1221442309151 has 2 divisors, whose sum is σ = 1221442309152. Its totient is φ = 1221442309150.

The previous prime is 1221442309147. The next prime is 1221442309163. The reversal of 1221442309151 is 1519032441221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221442309151 - 2² = 1221442309147 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221442309181) 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, 610721154575 + 610721154576.

It is an arithmetic number, because the mean of its divisors is an integer number (610721154576).

Almost surely, 2^{1221442309151} is an apocalyptic number.

1221442309151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221442309151 is an equidigital number, since it uses as much as digits as its factorization.

1221442309151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 1221442309151 in words is "one trillion, two hundred twenty-one billion, four hundred forty-two million, three hundred nine thousand, one hundred fifty-one".