213021122 has 16 divisors (see below), whose sum is σ = 336644640. Its totient is φ = 100816128.

The previous prime is 213021079. The next prime is 213021157. The reversal of 213021122 is 221120312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 213021097 and 213021106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66338 + ... + 69474.

It is an arithmetic number, because the mean of its divisors is an integer number (21040290).

Almost surely, 2^213021122 is an apocalyptic number.

213021122 is a deficient number, since it is larger than the sum of its proper divisors (123623518).

213021122 is a wasteful number, since it uses less digits than its factorization.

213021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4945.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 213021122 is about 14595.2431291842. The cubic root of 213021122 is about 597.2290019468.

Adding to 213021122 its reverse (221120312), we get a palindrome (434141434).

The spelling of 213021122 in words is "two hundred thirteen million, twenty-one thousand, one hundred twenty-two".