123221351 has 16 divisors (see below), whose sum is σ = 136401408. Its totient is φ = 110385600.

The previous prime is 123221341. The next prime is 123221363. The reversal of 123221351 is 153122321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123221351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335570 + ... + 335936.

It is an arithmetic number, because the mean of its divisors is an integer number (8525088).

Almost surely, 2^123221351 is an apocalyptic number.

123221351 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123221351 is a deficient number, since it is larger than the sum of its proper divisors (13180057).

123221351 is a wasteful number, since it uses less digits than its factorization.

123221351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

The product of its digits is 360, while the sum is 20.

The square root of 123221351 is about 11100.5112945305. The cubic root of 123221351 is about 497.6171299003.

Adding to 123221351 its reverse (153122321), we get a palindrome (276343672).

The spelling of 123221351 in words is "one hundred twenty-three million, two hundred twenty-one thousand, three hundred fifty-one".