101221211021 has 8 divisors (see below), whose sum is σ = 121769878080. Its totient is φ = 82194667488.

The previous prime is 101221210933. The next prime is 101221211033. The reversal of 101221211021 is 120112122101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221211021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221210987 and 101221211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221211051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380530736 + ... + 380531001.

It is an arithmetic number, because the mean of its divisors is an integer number (15221234760).

Almost surely, 2^101221211021 is an apocalyptic number.

It is an amenable number.

101221211021 is a deficient number, since it is larger than the sum of its proper divisors (20548667059).

101221211021 is an equidigital number, since it uses as much as digits as its factorization.

101221211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761061763.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101221211021 its reverse (120112122101), we get a palindrome (221333333122).

The spelling of 101221211021 in words is "one hundred one billion, two hundred twenty-one million, two hundred eleven thousand, twenty-one".