21012202120012 has 12 divisors (see below), whose sum is σ = 36771391671280. Its totient is φ = 10506090213936.

The previous prime is 21012202119977. The next prime is 21012202120031. The reversal of 21012202120012 is 21002120221012.

It is a happy number.

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, 2970313 + ... + 7130719.

Almost surely, 2^{21012202120012} is an apocalyptic number.

It is an amenable number.

21012202120012 is a deficient number, since it is larger than the sum of its proper divisors (15759189551268).

21012202120012 is a wasteful number, since it uses less digits than its factorization.

21012202120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423040 (or 5423038 counting only the distinct ones).

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

Adding to 21012202120012 its reverse (21002120221012), we get a palindrome (42014322341024).

The spelling of 21012202120012 in words is "twenty-one trillion, twelve billion, two hundred two million, one hundred twenty thousand, twelve".