101975221 has 4 divisors (see below), whose sum is σ = 103121100. Its totient is φ = 100829344.

The previous prime is 101975201. The next prime is 101975239. The reversal of 101975221 is 122579101.

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 50566321 + 51408900 = 7111^2 + 7170^2 .

It is a cyclic number.

It is not a de Polignac number, because 101975221 - 2¹¹ = 101973173 is a prime.

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 101975221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101975201) 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, 572806 + ... + 572983.

It is an arithmetic number, because the mean of its divisors is an integer number (25780275).

Almost surely, 2^101975221 is an apocalyptic number.

It is an amenable number.

101975221 is a deficient number, since it is larger than the sum of its proper divisors (1145879).

101975221 is an equidigital number, since it uses as much as digits as its factorization.

101975221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145878.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 101975221 is about 10098.2781205510. The cubic root of 101975221 is about 467.1950345970.

The spelling of 101975221 in words is "one hundred one million, nine hundred seventy-five thousand, two hundred twenty-one".