21012002120222 has 12 divisors (see below), whose sum is σ = 31728114055008. Its totient is φ = 10436424871500.

The previous prime is 21012002120209. The next prime is 21012002120261. The reversal of 21012002120222 is 22202120021012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21012002120222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230339054 + ... + 230430257.

It is an arithmetic number, because the mean of its divisors is an integer number (2644009504584).

Almost surely, 2^{21012002120222} is an apocalyptic number.

21012002120222 is a deficient number, since it is larger than the sum of its proper divisors (10716111934786).

21012002120222 is an equidigital number, since it uses as much as digits as its factorization.

21012002120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460769615 (or 460769464 counting only the distinct ones).

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

Adding to 21012002120222 its reverse (22202120021012), we get a palindrome (43214122141234).

The spelling of 21012002120222 in words is "twenty-one trillion, twelve billion, two million, one hundred twenty thousand, two hundred twenty-two".