211020021330 has 32 divisors (see below), whose sum is σ = 508250377728. Its totient is φ = 56071747200.

The previous prime is 211020021323. The next prime is 211020021371. The reversal of 211020021330 is 33120020112.

211020021330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211020021330² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 15 ways as a sum of consecutive naturals, for example, 12507586 + ... + 12524445.

It is an arithmetic number, because the mean of its divisors is an integer number (15882824304).

Almost surely, 2^211020021330 is an apocalyptic number.

211020021330 is an abundant number, since it is smaller than the sum of its proper divisors (297230356398).

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

211020021330 is a wasteful number, since it uses less digits than its factorization.

211020021330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25032322.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 211020021330 its reverse (33120020112), we get a palindrome (244140041442).

The spelling of 211020021330 in words is "two hundred eleven billion, twenty million, twenty-one thousand, three hundred thirty".