1221134310709 has 2 divisors, whose sum is σ = 1221134310710. Its totient is φ = 1221134310708.

The previous prime is 1221134310653. The next prime is 1221134310743. The reversal of 1221134310709 is 9070134311221.

It is a happy number.

It is an a-pointer prime, because the next prime (1221134310743) can be obtained adding 1221134310709 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 778506228900 + 442628081809 = 882330^2 + 665303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221134310709 - 2⁹ = 1221134310197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221132310709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610567155354 + 610567155355.

It is an arithmetic number, because the mean of its divisors is an integer number (610567155355).

Almost surely, 2^{1221134310709} is an apocalyptic number.

It is an amenable number.

1221134310709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221134310709 is an equidigital number, since it uses as much as digits as its factorization.

1221134310709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 1221134310709 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-four million, three hundred ten thousand, seven hundred nine".