20021212012120 has 32 divisors (see below), whose sum is σ = 49142974939920. Its totient is φ = 7280440731520.

The previous prime is 20021212012117. The next prime is 20021212012121. The reversal of 20021212012120 is 2121021212002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20021212012094 and 20021212012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021212012121) by changing a digit.

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, 22751376847 + ... + 22751377726.

Almost surely, 2^{20021212012120} is an apocalyptic number.

20021212012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021212012120 is an abundant number, since it is smaller than the sum of its proper divisors (29121762927800).

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

20021212012120 is a wasteful number, since it uses less digits than its factorization.

20021212012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45502754595 (or 45502754591 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021212012120 its reverse (2121021212002), we get a palindrome (22142233224122).

The spelling of 20021212012120 in words is "twenty trillion, twenty-one billion, two hundred twelve million, twelve thousand, one hundred twenty".