123122002021 has 4 divisors (see below), whose sum is σ = 123368740000. Its totient is φ = 122875264044.

The previous prime is 123122002013. The next prime is 123122002027. The reversal of 123122002021 is 120200221321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123122002021 - 2³ = 123122002013 is a prime.

It is a super-4 number, since 4×123122002021⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123122001986 and 123122002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123122002027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123368241 + ... + 123369238.

It is an arithmetic number, because the mean of its divisors is an integer number (30842185000).

Almost surely, 2^123122002021 is an apocalyptic number.

It is an amenable number.

123122002021 is a deficient number, since it is larger than the sum of its proper divisors (246737979).

123122002021 is an equidigital number, since it uses as much as digits as its factorization.

123122002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246737978.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 123122002021 its reverse (120200221321), we get a palindrome (243322223342).

The spelling of 123122002021 in words is "one hundred twenty-three billion, one hundred twenty-two million, two thousand, twenty-one".