10021210101 has 48 divisors (see below), whose sum is σ = 17857532160. Its totient is φ = 5288532480.

The previous prime is 10021210057. The next prime is 10021210151. The reversal of 10021210101 is 10101212001.

It is a happy number.

It is not a de Polignac number, because 10021210101 - 2¹¹ = 10021208053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021210151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 77220 + ... + 161261.

It is an arithmetic number, because the mean of its divisors is an integer number (372031920).

Almost surely, 2^10021210101 is an apocalyptic number.

It is an amenable number.

10021210101 is a deficient number, since it is larger than the sum of its proper divisors (7836322059).

10021210101 is a wasteful number, since it uses less digits than its factorization.

10021210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238546 (or 238543 counting only the distinct ones).

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

Adding to 10021210101 its reverse (10101212001), we get a palindrome (20122422102).

The spelling of 10021210101 in words is "ten billion, twenty-one million, two hundred ten thousand, one hundred one".