221022121323130 has 32 divisors (see below), whose sum is σ = 405680399596944. Its totient is φ = 86669247515136.

The previous prime is 221022121323071. The next prime is 221022121323137. The reversal of 221022121323130 is 31323121220122.

It can be written as a sum of positive squares in 8 ways, for example, as 127007242523001 + 94014878800129 = 11269749^2 + 9696127^2 .

It is a super-2 number, since 2×221022121323130² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221022121323095 and 221022121323104.

It is not an unprimeable number, because it can be changed into a prime (221022121323137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171254419 + ... + 172540198.

Almost surely, 2^{221022121323130} is an apocalyptic number.

221022121323130 is a deficient number, since it is larger than the sum of its proper divisors (184658278273814).

221022121323130 is a wasteful number, since it uses less digits than its factorization.

221022121323130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343795890.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 221022121323130 its reverse (31323121220122), we get a palindrome (252345242543252).

The spelling of 221022121323130 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty".