201010210100021 has 8 divisors (see below), whose sum is σ = 231247318337664. Its totient is φ = 171153442846800.

The previous prime is 201010210099999. The next prime is 201010210100153. The reversal of 201010210100021 is 120001012010102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201010210100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201010210099975 and 201010210100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201010210106021) 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, 95085244970 + ... + 95085247083.

It is an arithmetic number, because the mean of its divisors is an integer number (28905914792208).

Almost surely, 2^{201010210100021} is an apocalyptic number.

It is an amenable number.

201010210100021 is a deficient number, since it is larger than the sum of its proper divisors (30237108237643).

201010210100021 is a wasteful number, since it uses less digits than its factorization.

201010210100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190170492211.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201010210100021 its reverse (120001012010102), we get a palindrome (321011222110123).

The spelling of 201010210100021 in words is "two hundred one trillion, ten billion, two hundred ten million, one hundred thousand, twenty-one".