100101010221 has 40 divisors (see below), whose sum is σ = 150133663680. Its totient is φ = 66466775232.

The previous prime is 100101010213. The next prime is 100101010231. The reversal of 100101010221 is 122010101001.

It is a happy number.

It is not a de Polignac number, because 100101010221 - 2³ = 100101010213 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 (100101010231) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24671625 + ... + 24675681.

It is an arithmetic number, because the mean of its divisors is an integer number (3753341592).

Almost surely, 2^100101010221 is an apocalyptic number.

It is an amenable number.

100101010221 is a deficient number, since it is larger than the sum of its proper divisors (50032653459).

100101010221 is an equidigital number, since it uses as much as digits as its factorization.

100101010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5215 (or 5206 counting only the distinct ones).

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

Adding to 100101010221 its reverse (122010101001), we get a palindrome (222111111222).

The spelling of 100101010221 in words is "one hundred billion, one hundred one million, ten thousand, two hundred twenty-one".