20011021212020 has 24 divisors (see below), whose sum is σ = 42431136244224. Its totient is φ = 7926695780256.

The previous prime is 20011021212011. The next prime is 20011021212043. The reversal of 20011021212020 is 2021212011002.

It is a junction number, because it is equal to n+sod(n) for n = 20011021211986 and 20011021212004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4857041924 + ... + 4857046043.

It is an arithmetic number, because the mean of its divisors is an integer number (1767964010176).

Almost surely, 2^{20011021212020} is an apocalyptic number.

20011021212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011021212020 is an abundant number, since it is smaller than the sum of its proper divisors (22420115032204).

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

20011021212020 is a wasteful number, since it uses less digits than its factorization.

20011021212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9714088079 (or 9714088077 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20011021212020 its reverse (2021212011002), we get a palindrome (22032233223022).

The spelling of 20011021212020 in words is "twenty trillion, eleven billion, twenty-one million, two hundred twelve thousand, twenty".