221222012222210 has 32 divisors (see below), whose sum is σ = 399657860454384. Its totient is φ = 88164816768000.

The previous prime is 221222012222179. The next prime is 221222012222297. The reversal of 221222012222210 is 12222210222122.

It can be written as a sum of positive squares in 8 ways, for example, as 46598658395041 + 174623353827169 = 6826321^2 + 13214513^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23266700 + ... + 31365320.

Almost surely, 2^{221222012222210} is an apocalyptic number.

221222012222210 is a deficient number, since it is larger than the sum of its proper divisors (178435848232174).

221222012222210 is a wasteful number, since it uses less digits than its factorization.

221222012222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8108630.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221222012222210 its reverse (12222210222122), we get a palindrome (233444222444332).

The spelling of 221222012222210 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, twelve million, two hundred twenty-two thousand, two hundred ten".