21012200012002 has 8 divisors (see below), whose sum is σ = 31551794494812. Its totient is φ = 10494935180400.

The previous prime is 21012200011981. The next prime is 21012200012047. The reversal of 21012200012002 is 20021000221012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19351913644561 + 1660286367441 = 4399081^2 + 1288521^2 .

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, 5582410449 + ... + 5582414212.

Almost surely, 2^{21012200012002} is an apocalyptic number.

21012200012002 is a deficient number, since it is larger than the sum of its proper divisors (10539594482810).

21012200012002 is a wasteful number, since it uses less digits than its factorization.

21012200012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11164825604.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21012200012002 its reverse (20021000221012), we get a palindrome (41033200233014).

The spelling of 21012200012002 in words is "twenty-one trillion, twelve billion, two hundred million, twelve thousand, two".