211121212212020 has 96 divisors (see below), whose sum is σ = 492801281634816. Its totient is φ = 75320368947200.

The previous prime is 211121212211993. The next prime is 211121212212041. The reversal of 211121212212020 is 20212212121112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211121212211983 and 211121212212001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376582757 + ... + 377142963.

It is an arithmetic number, because the mean of its divisors is an integer number (5133346683696).

Almost surely, 2^{211121212212020} is an apocalyptic number.

211121212212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121212212020 is an abundant number, since it is smaller than the sum of its proper divisors (281680069422796).

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

211121212212020 is a wasteful number, since it uses less digits than its factorization.

211121212212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592601 (or 592599 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211121212212020 its reverse (20212212121112), we get a palindrome (231333424333132).

The spelling of 211121212212020 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, twenty".