21012120000222 has 32 divisors (see below), whose sum is σ = 45361878266880. Its totient is φ = 6450267060960.

The previous prime is 21012120000133. The next prime is 21012120000227. The reversal of 21012120000222 is 22200002121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012120000227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312479322 + ... + 312546557.

It is an arithmetic number, because the mean of its divisors is an integer number (1417558695840).

Almost surely, 2^{21012120000222} is an apocalyptic number.

21012120000222 is an abundant number, since it is smaller than the sum of its proper divisors (24349758266658).

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

21012120000222 is a wasteful number, since it uses less digits than its factorization.

21012120000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625026328.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012120000222 its reverse (22200002121012), we get a palindrome (43212122121234).

The spelling of 21012120000222 in words is "twenty-one trillion, twelve billion, one hundred twenty million, two hundred twenty-two", and thus it is an aban number.