201102100021 has 8 divisors (see below), whose sum is σ = 201592591200. Its totient is φ = 200612171760.

The previous prime is 201102100009. The next prime is 201102100039. The reversal of 201102100021 is 120001201102.

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 201102100021 - 2²¹ = 201100002869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201102099980 and 201102100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201102100421) 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, 579115 + ... + 858823.

It is an arithmetic number, because the mean of its divisors is an integer number (25199073900).

Almost surely, 2^201102100021 is an apocalyptic number.

It is an amenable number.

201102100021 is a deficient number, since it is larger than the sum of its proper divisors (490491179).

201102100021 is a wasteful number, since it uses less digits than its factorization.

201102100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281459.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201102100021 its reverse (120001201102), we get a palindrome (321103301123).

The spelling of 201102100021 in words is "two hundred one billion, one hundred two million, one hundred thousand, twenty-one".