211221202022210 has 48 divisors (see below), whose sum is σ = 402132192977592. Its totient is φ = 79868091744000.

The previous prime is 211221202022209. The next prime is 211221202022239. The reversal of 211221202022210 is 12220202122112.

It can be written as a sum of positive squares in 4 ways, for example, as 190190053665481 + 21031148356729 = 13790941^2 + 4585973^2 .

It is a super-2 number, since 2×211221202022210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61795691 + ... + 65124110.

Almost surely, 2^{211221202022210} is an apocalyptic number.

211221202022210 is a deficient number, since it is larger than the sum of its proper divisors (190910990955382).

211221202022210 is a wasteful number, since it uses less digits than its factorization.

211221202022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126920307 (or 126920288 counting only the distinct ones).

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

Adding to 211221202022210 its reverse (12220202122112), we get a palindrome (223441404144322).

The spelling of 211221202022210 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred two million, twenty-two thousand, two hundred ten".