101122221 has 8 divisors (see below), whose sum is σ = 138473824. Its totient is φ = 65592720.

The previous prime is 101122187. The next prime is 101122289. The reversal of 101122221 is 122221101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101122221 - 2¹⁸ = 100860077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101122197 and 101122206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101122121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455395 + ... + 455616.

It is an arithmetic number, because the mean of its divisors is an integer number (17309228).

Almost surely, 2^101122221 is an apocalyptic number.

It is an amenable number.

101122221 is a deficient number, since it is larger than the sum of its proper divisors (37351603).

101122221 is an equidigital number, since it uses as much as digits as its factorization.

101122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911051.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 101122221 is about 10055.9545046704. The cubic root of 101122221 is about 465.8887246819. Note that the first 3 decimals are identical.

Adding to 101122221 its reverse (122221101), we get a palindrome (223343322).

It can be divided in two parts, 1011 and 22221, that added together give a palindrome (23232).

The spelling of 101122221 in words is "one hundred one million, one hundred twenty-two thousand, two hundred twenty-one".