1221230310229 has 2 divisors, whose sum is σ = 1221230310230. Its totient is φ = 1221230310228.

The previous prime is 1221230310149. The next prime is 1221230310239. The reversal of 1221230310229 is 9220130321221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 834706986129 + 386523324100 = 913623^2 + 621710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221230310229 - 2¹³ = 1221230302037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221230310197 and 1221230310206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221230310239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610615155114 + 610615155115.

It is an arithmetic number, because the mean of its divisors is an integer number (610615155115).

Almost surely, 2^{1221230310229} is an apocalyptic number.

It is an amenable number.

1221230310229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221230310229 is an equidigital number, since it uses as much as digits as its factorization.

1221230310229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 1221230310229 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, three hundred ten thousand, two hundred twenty-nine".