212120200110221 has 8 divisors (see below), whose sum is σ = 241874617320504. Its totient is φ = 184285422720000.

The previous prime is 212120200110211. The next prime is 212120200110239. The reversal of 212120200110221 is 122011002021212.

It can be written as a sum of positive squares in 4 ways, for example, as 4424112196 + 212115775998025 = 66514^2 + 14564195^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212120200110221 - 2⁶ = 212120200110157 is a prime.

It is a super-2 number, since 2×212120200110221² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212120200110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120200110211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479909954780 + ... + 479909955221.

It is an arithmetic number, because the mean of its divisors is an integer number (30234327165063).

Almost surely, 2^{212120200110221} is an apocalyptic number.

It is an amenable number.

212120200110221 is a deficient number, since it is larger than the sum of its proper divisors (29754417210283).

212120200110221 is a wasteful number, since it uses less digits than its factorization.

212120200110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959819910031.

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

Adding to 212120200110221 its reverse (122011002021212), we get a palindrome (334131202131433).

The spelling of 212120200110221 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred million, one hundred ten thousand, two hundred twenty-one".