1221322122143 has 2 divisors, whose sum is σ = 1221322122144. Its totient is φ = 1221322122142.

The previous prime is 1221322122127. The next prime is 1221322122169. The reversal of 1221322122143 is 3412212231221.

It is an a-pointer prime, because the next prime (1221322122169) can be obtained adding 1221322122143 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221322122143 - 2⁴ = 1221322122127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221322122103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610661061071 + 610661061072.

It is an arithmetic number, because the mean of its divisors is an integer number (610661061072).

Almost surely, 2^{1221322122143} is an apocalyptic number.

1221322122143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221322122143 is an equidigital number, since it uses as much as digits as its factorization.

1221322122143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

Adding to 1221322122143 its reverse (3412212231221), we get a palindrome (4633534353364).

The spelling of 1221322122143 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-two thousand, one hundred forty-three".