1221443300111 has 2 divisors, whose sum is σ = 1221443300112. Its totient is φ = 1221443300110.

The previous prime is 1221443300083. The next prime is 1221443300131. The reversal of 1221443300111 is 1110033441221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221443300111 - 2¹⁴ = 1221443283727 is a prime.

It is a super-2 number, since 2×1221443300111² (a number of 25 digits) contains 22 as substring.

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 (1221443300131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610721650055 + 610721650056.

It is an arithmetic number, because the mean of its divisors is an integer number (610721650056).

Almost surely, 2^{1221443300111} is an apocalyptic number.

1221443300111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221443300111 is an equidigital number, since it uses as much as digits as its factorization.

1221443300111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1221443300111 its reverse (1110033441221), we get a palindrome (2331476741332).

The spelling of 1221443300111 in words is "one trillion, two hundred twenty-one billion, four hundred forty-three million, three hundred thousand, one hundred eleven".