123212002421 has 8 divisors (see below), whose sum is σ = 123669256320. Its totient is φ = 122754838608.

The previous prime is 123212002393. The next prime is 123212002451. The reversal of 123212002421 is 124200212321.

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 123212002421 - 2³⁴ = 106032133237 is a prime.

It is a super-2 number, since 2×123212002421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123212002393 and 123212002402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212002451) 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 7 ways as a sum of consecutive naturals, for example, 4108760 + ... + 4138638.

It is an arithmetic number, because the mean of its divisors is an integer number (15458657040).

Almost surely, 2^123212002421 is an apocalyptic number.

It is an amenable number.

123212002421 is a deficient number, since it is larger than the sum of its proper divisors (457253899).

123212002421 is a wasteful number, since it uses less digits than its factorization.

123212002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45043.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123212002421 its reverse (124200212321), we get a palindrome (247412214742).

The spelling of 123212002421 in words is "one hundred twenty-three billion, two hundred twelve million, two thousand, four hundred twenty-one".