123122021 has 8 divisors (see below), whose sum is σ = 136849824. Its totient is φ = 109816720.

The previous prime is 123122017. The next prime is 123122063. The reversal of 123122021 is 120221321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123122021 - 2² = 123122017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123121987 and 123122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123122821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105011 + ... + 106176.

It is an arithmetic number, because the mean of its divisors is an integer number (17106228).

Almost surely, 2^123122021 is an apocalyptic number.

123122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123122021 is a deficient number, since it is larger than the sum of its proper divisors (13727803).

123122021 is a wasteful number, since it uses less digits than its factorization.

123122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211251.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 123122021 is about 11096.0362742738. The cubic root of 123122021 is about 497.4833825245.

Adding to 123122021 its reverse (120221321), we get a palindrome (243343342).

The spelling of 123122021 in words is "one hundred twenty-three million, one hundred twenty-two thousand, twenty-one".