10201110021 has 6 divisors (see below), whose sum is σ = 14734936710. Its totient is φ = 6800740008.

The previous prime is 10201110019. The next prime is 10201110047. The reversal of 10201110021 is 12001110201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8623908225 + 1577201796 = 92865^2 + 39714^2 .

It is not a de Polignac number, because 10201110021 - 2¹ = 10201110019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1133456669 = 10201110021 / (1 + 0 + 2 + 0 + 1 + 1 + 1 + 0 + 0 + 2 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 10201109985 and 10201110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201110221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566728326 + ... + 566728343.

It is an arithmetic number, because the mean of its divisors is an integer number (2455822785).

Almost surely, 2^10201110021 is an apocalyptic number.

It is an amenable number.

10201110021 is a deficient number, since it is larger than the sum of its proper divisors (4533826689).

10201110021 is a wasteful number, since it uses less digits than its factorization.

10201110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133456675 (or 1133456672 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10201110021 its reverse (12001110201), we get a palindrome (22202220222).

The spelling of 10201110021 in words is "ten billion, two hundred one million, one hundred ten thousand, twenty-one".