123222031381 has 2 divisors, whose sum is σ = 123222031382. Its totient is φ = 123222031380.

The previous prime is 123222031369. The next prime is 123222031397. The reversal of 123222031381 is 183130222321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69413806225 + 53808225156 = 263465^2 + 231966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123222031381 is a prime.

It is a super-2 number, since 2×123222031381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123222031081) 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, 61611015690 + 61611015691.

It is an arithmetic number, because the mean of its divisors is an integer number (61611015691).

Almost surely, 2^123222031381 is an apocalyptic number.

It is an amenable number.

123222031381 is a deficient number, since it is larger than the sum of its proper divisors (1).

123222031381 is an equidigital number, since it uses as much as digits as its factorization.

123222031381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 123222031381 in words is "one hundred twenty-three billion, two hundred twenty-two million, thirty-one thousand, three hundred eighty-one".