21211002100222 has 64 divisors (see below), whose sum is σ = 35496260287488. Its totient is φ = 9423231376000.

The previous prime is 21211002100151. The next prime is 21211002100259. The reversal of 21211002100222 is 22200120011212.

It is a happy number.

It is a super-2 number, since 2×21211002100222² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211002100196 and 21211002100205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4797781572 + ... + 4797785992.

It is an arithmetic number, because the mean of its divisors is an integer number (554629066992).

Almost surely, 2^{21211002100222} is an apocalyptic number.

21211002100222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21211002100222 is a deficient number, since it is larger than the sum of its proper divisors (14285258187266).

21211002100222 is a wasteful number, since it uses less digits than its factorization.

21211002100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9825.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211002100222 its reverse (22200120011212), we get a palindrome (43411122111434).

The spelling of 21211002100222 in words is "twenty-one trillion, two hundred eleven billion, two million, one hundred thousand, two hundred twenty-two".