101310221 has 4 divisors (see below), whose sum is σ = 103781244. Its totient is φ = 98839200.

The previous prime is 101310217. The next prime is 101310227. The reversal of 101310221 is 122013101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122013101 = 7 ⋅17430443.

It can be written as a sum of positive squares in 2 ways, for example, as 13213225 + 88096996 = 3635^2 + 9386^2 .

It is a cyclic number.

It is not a de Polignac number, because 101310221 - 2² = 101310217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101310227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235450 + ... + 1235531.

It is an arithmetic number, because the mean of its divisors is an integer number (25945311).

Almost surely, 2^101310221 is an apocalyptic number.

It is an amenable number.

101310221 is a deficient number, since it is larger than the sum of its proper divisors (2471023).

101310221 is an equidigital number, since it uses as much as digits as its factorization.

101310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471022.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 101310221 is about 10065.2978594774. The cubic root of 101310221 is about 466.1772628376.

Adding to 101310221 its reverse (122013101), we get a palindrome (223323322).

The spelling of 101310221 in words is "one hundred one million, three hundred ten thousand, two hundred twenty-one".