211202021020 has 24 divisors (see below), whose sum is σ = 457831479168. Its totient is φ = 81755620800.

The previous prime is 211202021003. The next prime is 211202021039. The reversal of 211202021020 is 20120202112.

It is a happy number.

211202021020 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×211202021020³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170323591 + ... + 170324830.

It is an arithmetic number, because the mean of its divisors is an integer number (19076311632).

Almost surely, 2^211202021020 is an apocalyptic number.

211202021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202021020 is an abundant number, since it is smaller than the sum of its proper divisors (246629458148).

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

211202021020 is a wasteful number, since it uses less digits than its factorization.

211202021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340648461 (or 340648459 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 211202021020 its reverse (20120202112), we get a palindrome (231322223132).

The spelling of 211202021020 in words is "two hundred eleven billion, two hundred two million, twenty-one thousand, twenty".