222121022021210 has 24 divisors (see below), whose sum is σ = 432938844108540. Its totient is φ = 82013915822592.

The previous prime is 222121022021189. The next prime is 222121022021257. The reversal of 222121022021210 is 12120220121222.

It can be written as a sum of positive squares in 6 ways, for example, as 32612676984001 + 189508345037209 = 5710751^2 + 13766203^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65716277015 + ... + 65716280394.

Almost surely, 2^{222121022021210} is an apocalyptic number.

222121022021210 is a deficient number, since it is larger than the sum of its proper divisors (210817822087330).

222121022021210 is a wasteful number, since it uses less digits than its factorization.

222121022021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131432557442 (or 131432557429 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222121022021210 its reverse (12120220121222), we get a palindrome (234241242142432).

The spelling of 222121022021210 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, two hundred ten".