101002221 has 16 divisors (see below), whose sum is σ = 151483520. Its totient is φ = 67333356.

The previous prime is 101002207. The next prime is 101002241. The reversal of 101002221 is 122200101.

It is not a de Polignac number, because 101002221 - 2⁵ = 101002189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20905 + ... + 25278.

It is an arithmetic number, because the mean of its divisors is an integer number (9467720).

Almost surely, 2^101002221 is an apocalyptic number.

It is an amenable number.

101002221 is a deficient number, since it is larger than the sum of its proper divisors (50481299).

101002221 is an frugal number, since it uses more digits than its factorization.

101002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46204 (or 46186 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 101002221 is about 10049.9861193934. The cubic root of 101002221 is about 465.7043643587.

Adding to 101002221 its reverse (122200101), we get a palindrome (223202322).

It can be divided in two parts, 10100 and 2221, that added together give a palindrome (12321).

The spelling of 101002221 in words is "one hundred one million, two thousand, two hundred twenty-one".