101223133221 has 12 divisors (see below), whose sum is σ = 156999145632. Its totient is φ = 57841790328.

The previous prime is 101223133189. The next prime is 101223133339. The reversal of 101223133221 is 122331322101.

It is not a de Polignac number, because 101223133221 - 2⁵ = 101223133189 is a prime.

It is a super-2 number, since 2×101223133221² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101223133721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344296225 + ... + 344296518.

It is an arithmetic number, because the mean of its divisors is an integer number (13083262136).

Almost surely, 2^101223133221 is an apocalyptic number.

It is an amenable number.

101223133221 is a deficient number, since it is larger than the sum of its proper divisors (55776012411).

101223133221 is an equidigital number, since it uses as much as digits as its factorization.

101223133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688592760 (or 688592753 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 101223133221 its reverse (122331322101), we get a palindrome (223554455322).

The spelling of 101223133221 in words is "one hundred one billion, two hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty-one".