211121220331020 has 96 divisors (see below), whose sum is σ = 611556055891200. Its totient is φ = 54354756766464.

The previous prime is 211121220330989. The next prime is 211121220331141. The reversal of 211121220331020 is 20133022121112.

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, 29597787 + ... + 36031533.

It is an arithmetic number, because the mean of its divisors is an integer number (6370375582200).

Almost surely, 2^{211121220331020} is an apocalyptic number.

211121220331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121220331020 is an abundant number, since it is smaller than the sum of its proper divisors (400434835560180).

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

211121220331020 is a wasteful number, since it uses less digits than its factorization.

211121220331020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452647 (or 6452645 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 211121220331020 its reverse (20133022121112), we get a palindrome (231254242452132).

The spelling of 211121220331020 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, three hundred thirty-one thousand, twenty".