20012212120020 has 24 divisors (see below), whose sum is σ = 56034193936224. Its totient is φ = 5336589898656.

The previous prime is 20012212120009. The next prime is 20012212120027. The reversal of 20012212120020 is 2002121221002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012212120027) 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, 166768434274 + ... + 166768434393.

It is an arithmetic number, because the mean of its divisors is an integer number (2334758080676).

Almost surely, 2^{20012212120020} is an apocalyptic number.

20012212120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012212120020 is an abundant number, since it is smaller than the sum of its proper divisors (36021981816204).

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

20012212120020 is a wasteful number, since it uses less digits than its factorization.

20012212120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333536868679 (or 333536868677 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012212120020 its reverse (2002121221002), we get a palindrome (22014333341022).

The spelling of 20012212120020 in words is "twenty trillion, twelve billion, two hundred twelve million, one hundred twenty thousand, twenty".