20021212012020 has 48 divisors (see below), whose sum is σ = 56063885152128. Its totient is φ = 5338562106240.

The previous prime is 20021212012007. The next prime is 20021212012051. The reversal of 20021212012020 is 2021021212002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12612151 + ... + 14110590.

It is an arithmetic number, because the mean of its divisors is an integer number (1167997607336).

Almost surely, 2^{20021212012020} is an apocalyptic number.

20021212012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021212012020 is an abundant number, since it is smaller than the sum of its proper divisors (36042673140108).

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

20021212012020 is a wasteful number, since it uses less digits than its factorization.

20021212012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26735240 (or 26735238 counting only the distinct ones).

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

Adding to 20021212012020 its reverse (2021021212002), we get a palindrome (22042233224022).

The spelling of 20021212012020 in words is "twenty trillion, twenty-one billion, two hundred twelve million, twelve thousand, twenty".