101221243 has 4 divisors (see below), whose sum is σ = 101248920. Its totient is φ = 101193568.

The previous prime is 101221201. The next prime is 101221259. The reversal of 101221243 is 342122101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101221243 - 2²⁵ = 67666811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221273) 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, 7333 + ... + 16006.

It is an arithmetic number, because the mean of its divisors is an integer number (25312230).

Almost surely, 2^101221243 is an apocalyptic number.

101221243 is a deficient number, since it is larger than the sum of its proper divisors (27677).

101221243 is an equidigital number, since it uses as much as digits as its factorization.

101221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27676.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 101221243 is about 10060.8768504539. The cubic root of 101221243 is about 466.0407459444.

Adding to 101221243 its reverse (342122101), we get a palindrome (443343344).

The spelling of 101221243 in words is "one hundred one million, two hundred twenty-one thousand, two hundred forty-three".