20121212120019 has 4 divisors (see below), whose sum is σ = 26828282826696. Its totient is φ = 13414141413344.

The previous prime is 20121212120017. The next prime is 20121212120027. The reversal of 20121212120019 is 91002121212102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121212120019 - 2¹ = 20121212120017 is a prime.

It is a super-2 number, since 2×20121212120019² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121212120017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353535353334 + ... + 3353535353339.

It is an arithmetic number, because the mean of its divisors is an integer number (6707070706674).

Almost surely, 2^{20121212120019} is an apocalyptic number.

20121212120019 is a deficient number, since it is larger than the sum of its proper divisors (6707070706677).

20121212120019 is an equidigital number, since it uses as much as digits as its factorization.

20121212120019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707070706676.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 20121212120019 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, nineteen".