211021211020 has 24 divisors (see below), whose sum is σ = 445394016144. Its totient is φ = 83980013376.

The previous prime is 211021210991. The next prime is 211021211039. The reversal of 211021211020 is 20112120112.

211021211020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 26775402 + ... + 26783281.

It is an arithmetic number, because the mean of its divisors is an integer number (18558084006).

Almost surely, 2^211021211020 is an apocalyptic number.

211021211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021211020 is an abundant number, since it is smaller than the sum of its proper divisors (234372805124).

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

211021211020 is a wasteful number, since it uses less digits than its factorization.

211021211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53558889 (or 53558887 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211021211020 its reverse (20112120112), we get a palindrome (231133331132).

The spelling of 211021211020 in words is "two hundred eleven billion, twenty-one million, two hundred eleven thousand, twenty".