101361221 has 4 divisors (see below), whose sum is σ = 109158252. Its totient is φ = 93564192.

The previous prime is 101361209. The next prime is 101361251. The reversal of 101361221 is 122163101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65529025 + 35832196 = 8095^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 101361221 - 2¹⁰ = 101360197 is a prime.

It is a super-2 number, since 2×101361221² = 20548194245221682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101361221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101361251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3898496 + ... + 3898521.

It is an arithmetic number, because the mean of its divisors is an integer number (27289563).

Almost surely, 2^101361221 is an apocalyptic number.

It is an amenable number.

101361221 is a deficient number, since it is larger than the sum of its proper divisors (7797031).

101361221 is an equidigital number, since it uses as much as digits as its factorization.

101361221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7797030.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 101361221 is about 10067.8309977870. The cubic root of 101361221 is about 466.2554749265.

The spelling of 101361221 in words is "one hundred one million, three hundred sixty-one thousand, two hundred twenty-one".