21210200012001 has 128 divisors (see below), whose sum is σ = 39025708646400. Its totient is φ = 9895769844480.

The previous prime is 21210200011967. The next prime is 21210200012093. The reversal of 21210200012001 is 10021000201212.

It is not a de Polignac number, because 21210200012001 - 2¹⁴ = 21210199995617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210200012201) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 152041240 + ... + 152180678.

It is an arithmetic number, because the mean of its divisors is an integer number (304888348800).

Almost surely, 2^{21210200012001} is an apocalyptic number.

21210200012001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21210200012001 is a deficient number, since it is larger than the sum of its proper divisors (17815508634399).

21210200012001 is a wasteful number, since it uses less digits than its factorization.

21210200012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139584 (or 139510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21210200012001 its reverse (10021000201212), we get a palindrome (31231200213213).

The spelling of 21210200012001 in words is "twenty-one trillion, two hundred ten billion, two hundred million, twelve thousand, one".