1212012330021 has 12 divisors (see below), whose sum is σ = 1750774642240. Its totient is φ = 807966605160.

The previous prime is 1212012330013. The next prime is 1212012330029. The reversal of 1212012330021 is 1200332102121.

1212012330021 is a `hidden beast` number, since 121 + 201 + 23 + 300 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (1212012330013) and next prime (1212012330029).

It is not a de Polignac number, because 1212012330021 - 2³ = 1212012330013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212012329976 and 1212012330003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212012330029) 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 11 ways as a sum of consecutive naturals, for example, 3282931 + ... + 3633408.

Almost surely, 2^{1212012330021} is an apocalyptic number.

It is an amenable number.

1212012330021 is a deficient number, since it is larger than the sum of its proper divisors (538762312219).

1212012330021 is a wasteful number, since it uses less digits than its factorization.

1212012330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935816 (or 6935813 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1212012330021 its reverse (1200332102121), we get a palindrome (2412344432142).

The spelling of 1212012330021 in words is "one trillion, two hundred twelve billion, twelve million, three hundred thirty thousand, twenty-one".