123333921553 has 2 divisors, whose sum is σ = 123333921554. Its totient is φ = 123333921552.

The previous prime is 123333921539. The next prime is 123333921583. The reversal of 123333921553 is 355129333321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112742835984 + 10591085569 = 335772^2 + 102913^2 .

It is a cyclic number.

It is not a de Polignac number, because 123333921553 - 2⁵ = 123333921521 is a prime.

It is a super-2 number, since 2×123333921553² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123333921583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61666960776 + 61666960777.

It is an arithmetic number, because the mean of its divisors is an integer number (61666960777).

Almost surely, 2^123333921553 is an apocalyptic number.

It is an amenable number.

123333921553 is a deficient number, since it is larger than the sum of its proper divisors (1).

123333921553 is an equidigital number, since it uses as much as digits as its factorization.

123333921553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 40.

The spelling of 123333921553 in words is "one hundred twenty-three billion, three hundred thirty-three million, nine hundred twenty-one thousand, five hundred fifty-three".