21021001201012 has 12 divisors (see below), whose sum is σ = 36792625808736. Its totient is φ = 10508822398520.

The previous prime is 21021001200937. The next prime is 21021001201051. The reversal of 21021001201012 is 21010210012012.

It is a junction number, because it is equal to n+sod(n) for n = 21021001200983 and 21021001201001.

It is a congruent 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, 419522314 + ... + 419572417.

It is an arithmetic number, because the mean of its divisors is an integer number (3066052150728).

Almost surely, 2^{21021001201012} is an apocalyptic number.

It is an amenable number.

21021001201012 is a deficient number, since it is larger than the sum of its proper divisors (15771624607724).

21021001201012 is a wasteful number, since it uses less digits than its factorization.

21021001201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839100998 (or 839100996 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21021001201012 its reverse (21010210012012), we get a palindrome (42031211213024).

The spelling of 21021001201012 in words is "twenty-one trillion, twenty-one billion, one million, two hundred one thousand, twelve".