21022001000012 has 6 divisors (see below), whose sum is σ = 36788501750028. Its totient is φ = 10511000500004.

The previous prime is 21022000999981. The next prime is 21022001000071. The reversal of 21022001000012 is 21000010022012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21022000999957 and 21022001000002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2627750124998 + ... + 2627750125005.

It is an arithmetic number, because the mean of its divisors is an integer number (6131416958338).

Almost surely, 2^{21022001000012} is an apocalyptic number.

It is an amenable number.

21022001000012 is a deficient number, since it is larger than the sum of its proper divisors (15766500750016).

21022001000012 is a wasteful number, since it uses less digits than its factorization.

21022001000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5255500250007 (or 5255500250005 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21022001000012 its reverse (21000010022012), we get a palindrome (42022011022024).

The spelling of 21022001000012 in words is "twenty-one trillion, twenty-two billion, one million, twelve", and thus it is an aban number and an uban number.