123220029 has 16 divisors (see below), whose sum is σ = 174432960. Its totient is φ = 77103360.

The previous prime is 123219977. The next prime is 123220051. The reversal of 123220029 is 920022321.

It is not a de Polignac number, because 123220029 - 2¹² = 123215933 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123219987 and 123220014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16734 + ... + 22944.

It is an arithmetic number, because the mean of its divisors is an integer number (10902060).

Almost surely, 2^123220029 is an apocalyptic number.

It is an amenable number.

123220029 is a deficient number, since it is larger than the sum of its proper divisors (51212931).

123220029 is a wasteful number, since it uses less digits than its factorization.

123220029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 123220029 is about 11100.4517475642. The cubic root of 123220029 is about 497.6153503056.

The spelling of 123220029 in words is "one hundred twenty-three million, two hundred twenty thousand, twenty-nine".