21122052230 has 16 divisors (see below), whose sum is σ = 38396128464. Its totient is φ = 8365168800.

The previous prime is 21122052223. The next prime is 21122052233. The reversal of 21122052230 is 3225022112.

It is a super-2 number, since 2×21122052230² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122052233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10455452 + ... + 10457471.

It is an arithmetic number, because the mean of its divisors is an integer number (2399758029).

Almost surely, 2^21122052230 is an apocalyptic number.

21122052230 is a deficient number, since it is larger than the sum of its proper divisors (17274076234).

21122052230 is a wasteful number, since it uses less digits than its factorization.

21122052230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20913031.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21122052230 its reverse (3225022112), we get a palindrome (24347074342).

The spelling of 21122052230 in words is "twenty-one billion, one hundred twenty-two million, fifty-two thousand, two hundred thirty".