211221212200010 has 16 divisors (see below), whose sum is σ = 380200773645000. Its totient is φ = 84487908950016.

The previous prime is 211221212199989. The next prime is 211221212200067. The reversal of 211221212200010 is 10002212122112.

It can be written as a sum of positive squares in 4 ways, for example, as 188581858365121 + 22639353834889 = 13732511^2 + 4758083^2 .

It is a super-2 number, since 2×211221212200010² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70449335 + ... + 73386314.

Almost surely, 2^{211221212200010} is an apocalyptic number.

211221212200010 is a deficient number, since it is larger than the sum of its proper divisors (168979561444990).

211221212200010 is a wasteful number, since it uses less digits than its factorization.

211221212200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143982505.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211221212200010 its reverse (10002212122112), we get a palindrome (221223424322122).

The spelling of 211221212200010 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred thousand, ten".