123210029 has 2 divisors, whose sum is σ = 123210030. Its totient is φ = 123210028.

The previous prime is 123210019. The next prime is 123210049. The reversal of 123210029 is 920012321.

It is an a-pointer prime, because the next prime (123210049) can be obtained adding 123210029 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107226025 + 15984004 = 10355^2 + 3998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123210029 is a prime.

It is a super-2 number, since 2×123210029² = 30361422492361682, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123210019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605014 + 61605015.

It is an arithmetic number, because the mean of its divisors is an integer number (61605015).

Almost surely, 2^123210029 is an apocalyptic number.

It is an amenable number.

123210029 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210029 is an equidigital number, since it uses as much as digits as its factorization.

123210029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 123210029 is about 11100.0013063062. The cubic root of 123210029 is about 497.6018885111.

The spelling of 123210029 in words is "one hundred twenty-three million, two hundred ten thousand, twenty-nine".