201012210100021 has 8 divisors (see below), whose sum is σ = 206140887494784. Its totient is φ = 195919025282880.

The previous prime is 201012210100001. The next prime is 201012210100027. The reversal of 201012210100021 is 120001012210102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201012210100021 - 2⁹ = 201012210099509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201012210099974 and 201012210100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201012210100027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8873132935 + ... + 8873155588.

It is an arithmetic number, because the mean of its divisors is an integer number (25767610936848).

Almost surely, 2^{201012210100021} is an apocalyptic number.

It is an amenable number.

201012210100021 is a deficient number, since it is larger than the sum of its proper divisors (5128677394763).

201012210100021 is a wasteful number, since it uses less digits than its factorization.

201012210100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17746288811.

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

Adding to 201012210100021 its reverse (120001012210102), we get a palindrome (321013222310123).

The spelling of 201012210100021 in words is "two hundred one trillion, twelve billion, two hundred ten million, one hundred thousand, twenty-one".