21001001212202 has 16 divisors (see below), whose sum is σ = 34378756668000. Its totient is φ = 9542164653840.

The previous prime is 21001001212189. The next prime is 21001001212207. The reversal of 21001001212202 is 20221210010012.

It is not an unprimeable number, because it can be changed into a prime (21001001212207) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 187192052 + ... + 187304207.

It is an arithmetic number, because the mean of its divisors is an integer number (2148672291750).

Almost surely, 2^{21001001212202} is an apocalyptic number.

21001001212202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21001001212202 is a deficient number, since it is larger than the sum of its proper divisors (13377755455798).

21001001212202 is a wasteful number, since it uses less digits than its factorization.

21001001212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374498821.

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

Adding to 21001001212202 its reverse (20221210010012), we get a palindrome (41222211222214).

The spelling of 21001001212202 in words is "twenty-one trillion, one billion, one million, two hundred twelve thousand, two hundred two".