1242205052124 has 24 divisors (see below), whose sum is σ = 2917673680768. Its totient is φ = 411326175600.

The previous prime is 1242205052117. The next prime is 1242205052183. The reversal of 1242205052124 is 4212505022421.

It is a super-2 number, since 2×1242205052124² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242205052091 and 1242205052100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342770002 + ... + 342773625.

Almost surely, 2^{1242205052124} is an apocalyptic number.

It is an amenable number.

1242205052124 is an abundant number, since it is smaller than the sum of its proper divisors (1675468628644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242205052124 is a wasteful number, since it uses less digits than its factorization.

1242205052124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685543785 (or 685543783 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

The spelling of 1242205052124 in words is "one trillion, two hundred forty-two billion, two hundred five million, fifty-two thousand, one hundred twenty-four".