123213151 has 2 divisors, whose sum is σ = 123213152. Its totient is φ = 123213150.

The previous prime is 123213149. The next prime is 123213163. The reversal of 123213151 is 151312321.

It is a weak prime.

It is an emirp because it is prime and its reverse (151312321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123213151 - 2¹ = 123213149 is a prime.

Together with 123213149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123213451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606575 + 61606576.

It is an arithmetic number, because the mean of its divisors is an integer number (61606576).

Almost surely, 2^123213151 is an apocalyptic number.

123213151 is a deficient number, since it is larger than the sum of its proper divisors (1).

123213151 is an equidigital number, since it uses as much as digits as its factorization.

123213151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 123213151 is about 11100.1419360295. The cubic root of 123213151 is about 497.6060913615.

Adding to 123213151 its reverse (151312321), we get a palindrome (274525472).

The spelling of 123213151 in words is "one hundred twenty-three million, two hundred thirteen thousand, one hundred fifty-one".