21002011012222 has 8 divisors (see below), whose sum is σ = 31503045978000. Its totient is φ = 10500995686224.

The previous prime is 21002011012163. The next prime is 21002011012223. The reversal of 21002011012222 is 22221011020012.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21002011012196 and 21002011012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002011012223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856847 + ... + 6741802.

It is an arithmetic number, because the mean of its divisors is an integer number (3937880747250).

Almost surely, 2^{21002011012222} is an apocalyptic number.

21002011012222 is a deficient number, since it is larger than the sum of its proper divisors (10501034965778).

21002011012222 is a wasteful number, since it uses less digits than its factorization.

21002011012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9819890.

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

Adding to 21002011012222 its reverse (22221011020012), we get a palindrome (43223022032234).

The spelling of 21002011012222 in words is "twenty-one trillion, two billion, eleven million, twelve thousand, two hundred twenty-two".