20121642120036 has 24 divisors (see below), whose sum is σ = 46950691531744. Its totient is φ = 6707186432640.

The previous prime is 20121642119989. The next prime is 20121642120043. The reversal of 20121642120036 is 63002124612102.

It is a junction number, because it is equal to n+sod(n) for n = 20121642119985 and 20121642120012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298885 + ... + 6350796.

Almost surely, 2^{20121642120036} is an apocalyptic number.

It is an amenable number.

20121642120036 is an abundant number, since it is smaller than the sum of its proper divisors (26829049411708).

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

20121642120036 is a wasteful number, since it uses less digits than its factorization.

20121642120036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901851 (or 6901849 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 20121642120036 its reverse (63002124612102), we get a palindrome (83123766732138).

The spelling of 20121642120036 in words is "twenty trillion, one hundred twenty-one billion, six hundred forty-two million, one hundred twenty thousand, thirty-six".