211133121020 has 48 divisors (see below), whose sum is σ = 446822006400. Its totient is φ = 83800066560.

The previous prime is 211133120981. The next prime is 211133121037. The reversal of 211133121020 is 20121331112.

It is a self number, because there is not a number n which added to its sum of digits gives 211133121020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1264586 + ... + 1421774.

It is an arithmetic number, because the mean of its divisors is an integer number (9308791800).

Almost surely, 2^211133121020 is an apocalyptic number.

211133121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211133121020 is an abundant number, since it is smaller than the sum of its proper divisors (235688885380).

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

211133121020 is a wasteful number, since it uses less digits than its factorization.

211133121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157718 (or 157716 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 211133121020 its reverse (20121331112), we get a palindrome (231254452132).

The spelling of 211133121020 in words is "two hundred eleven billion, one hundred thirty-three million, one hundred twenty-one thousand, twenty".