21001202012012 has 12 divisors (see below), whose sum is σ = 38913991963560. Its totient is φ = 9882918593856.

The previous prime is 21001202012003. The next prime is 21001202012041. The reversal of 21001202012012 is 21021020210012.

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, 154420602962 + ... + 154420603097.

It is an arithmetic number, because the mean of its divisors is an integer number (3242832663630).

Almost surely, 2^{21001202012012} is an apocalyptic number.

It is an amenable number.

21001202012012 is a deficient number, since it is larger than the sum of its proper divisors (17912789951548).

21001202012012 is a wasteful number, since it uses less digits than its factorization.

21001202012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308841206080 (or 308841206078 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001202012012 its reverse (21021020210012), we get a palindrome (42022222222024).

The spelling of 21001202012012 in words is "twenty-one trillion, one billion, two hundred two million, twelve thousand, twelve".