101025221 has 4 divisors (see below), whose sum is σ = 110209344. Its totient is φ = 91841100.

The previous prime is 101025179. The next prime is 101025229. The reversal of 101025221 is 122520101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122520101 = 11 ⋅11138191.

It is a cyclic number.

It is not a de Polignac number, because 101025221 - 2¹⁴ = 101008837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101025196 and 101025205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101025229) 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, 4592045 + ... + 4592066.

It is an arithmetic number, because the mean of its divisors is an integer number (27552336).

Almost surely, 2^101025221 is an apocalyptic number.

101025221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101025221 is a deficient number, since it is larger than the sum of its proper divisors (9184123).

101025221 is an equidigital number, since it uses as much as digits as its factorization.

101025221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9184122.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 101025221 is about 10051.1303344450. The cubic root of 101025221 is about 465.7397113947.

Adding to 101025221 its reverse (122520101), we get a palindrome (223545322).

The spelling of 101025221 in words is "one hundred one million, twenty-five thousand, two hundred twenty-one".