21101022222002 has 8 divisors (see below), whose sum is σ = 32170410928812. Its totient is φ = 10377551912400.

The previous prime is 21101022221891. The next prime is 21101022222011. The reversal of 21101022222002 is 20022222010112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14123082608761 + 6977939613241 = 3758069^2 + 2641579^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86479599149 + ... + 86479599392.

Almost surely, 2^{21101022222002} is an apocalyptic number.

21101022222002 is a deficient number, since it is larger than the sum of its proper divisors (11069388706810).

21101022222002 is a wasteful number, since it uses less digits than its factorization.

21101022222002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172959198604.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21101022222002 its reverse (20022222010112), we get a palindrome (41123244232114).

The spelling of 21101022222002 in words is "twenty-one trillion, one hundred one billion, twenty-two million, two hundred twenty-two thousand, two".