211221100100202 has 16 divisors (see below), whose sum is σ = 425525719911552. Its totient is φ = 69893113414880.

The previous prime is 211221100100167. The next prime is 211221100100207. The reversal of 211221100100202 is 202001001122112.

It is a super-2 number, since 2×211221100100202² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221100100207) 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, 128479987074 + ... + 128479988717.

It is an arithmetic number, because the mean of its divisors is an integer number (26595357494472).

Almost surely, 2^{211221100100202} is an apocalyptic number.

211221100100202 is an abundant number, since it is smaller than the sum of its proper divisors (214304619811350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221100100202 is a wasteful number, since it uses less digits than its factorization.

211221100100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256959975933.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211221100100202 its reverse (202001001122112), we get a palindrome (413222101222314).

The spelling of 211221100100202 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred million, one hundred thousand, two hundred two".