211221121102210 has 32 divisors (see below), whose sum is σ = 388289679201792. Its totient is φ = 82690323186240.

The previous prime is 211221121102207. The next prime is 211221121102219. The reversal of 211221121102210 is 12201121122112.

It is a happy number.

It is a super-2 number, since 2×211221121102210² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221121102219) 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, 82126144 + ... + 84658996.

It is an arithmetic number, because the mean of its divisors is an integer number (12134052475056).

Almost surely, 2^{211221121102210} is an apocalyptic number.

211221121102210 is a deficient number, since it is larger than the sum of its proper divisors (177068558099582).

211221121102210 is a wasteful number, since it uses less digits than its factorization.

211221121102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710338.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211221121102210 its reverse (12201121122112), we get a palindrome (223422242224322).

The spelling of 211221121102210 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, two hundred ten".