101221103021 has 4 divisors (see below), whose sum is σ = 101233128672. Its totient is φ = 101209077372.

The previous prime is 101221103017. The next prime is 101221103023. The reversal of 101221103021 is 120301122101.

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: 120301122101 = 14011 ⋅8586191.

It is a cyclic number.

It is not a de Polignac number, because 101221103021 - 2² = 101221103017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221102987 and 101221103005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221103023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6000191 + ... + 6017036.

It is an arithmetic number, because the mean of its divisors is an integer number (25308282168).

Almost surely, 2^101221103021 is an apocalyptic number.

It is an amenable number.

101221103021 is a deficient number, since it is larger than the sum of its proper divisors (12025651).

101221103021 is an equidigital number, since it uses as much as digits as its factorization.

101221103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12025650.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 101221103021 its reverse (120301122101), we get a palindrome (221522225122).

The spelling of 101221103021 in words is "one hundred one billion, two hundred twenty-one million, one hundred three thousand, twenty-one".