101020011221 has 4 divisors (see below), whose sum is σ = 101020662912. Its totient is φ = 101019359532.

The previous prime is 101020011119. The next prime is 101020011259. The reversal of 101020011221 is 122110020101.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101020011221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020013221) 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 3 ways as a sum of consecutive naturals, for example, 55226 + ... + 452868.

It is an arithmetic number, because the mean of its divisors is an integer number (25255165728).

Almost surely, 2^101020011221 is an apocalyptic number.

It is an amenable number.

101020011221 is a deficient number, since it is larger than the sum of its proper divisors (651691).

101020011221 is an equidigital number, since it uses as much as digits as its factorization.

101020011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651690.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101020011221 its reverse (122110020101), we get a palindrome (223130031322).

The spelling of 101020011221 in words is "one hundred one billion, twenty million, eleven thousand, two hundred twenty-one".