211212102200221 has 16 divisors (see below), whose sum is σ = 212356107648000. Its totient is φ = 210071812608000.

The previous prime is 211212102200213. The next prime is 211212102200299. The reversal of 211212102200221 is 122002201212112.

It is a cyclic number.

It is not a de Polignac number, because 211212102200221 - 2³ = 211212102200213 is a prime.

It is a super-2 number, since 2×211212102200221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212102200201) 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, 262289476 + ... + 263093506.

It is an arithmetic number, because the mean of its divisors is an integer number (13272256728000).

Almost surely, 2^{211212102200221} is an apocalyptic number.

It is an amenable number.

211212102200221 is a deficient number, since it is larger than the sum of its proper divisors (1144005447779).

211212102200221 is a wasteful number, since it uses less digits than its factorization.

211212102200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806340.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211212102200221 its reverse (122002201212112), we get a palindrome (333214303412333).

The spelling of 211212102200221 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred two million, two hundred thousand, two hundred twenty-one".