212221053030 has 64 divisors (see below), whose sum is σ = 582478138368. Its totient is φ = 48475493760.

The previous prime is 212221053013. The next prime is 212221053041. The reversal of 212221053030 is 30350122212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212221052988 and 212221053006.

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 31 ways as a sum of consecutive naturals, for example, 17097 + ... + 651716.

It is an arithmetic number, because the mean of its divisors is an integer number (9101220912).

Almost surely, 2^212221053030 is an apocalyptic number.

212221053030 is an abundant number, since it is smaller than the sum of its proper divisors (370257085338).

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

212221053030 is a wasteful number, since it uses less digits than its factorization.

212221053030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670341.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 212221053030 its reverse (30350122212), we get a palindrome (242571175242).

The spelling of 212221053030 in words is "two hundred twelve billion, two hundred twenty-one million, fifty-three thousand, thirty".