101001021221 has 4 divisors (see below), whose sum is σ = 101620659552. Its totient is φ = 100381382892.

The previous prime is 101001021193. The next prime is 101001021223. The reversal of 101001021221 is 122120100101.

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.

It is a cyclic number.

It is not a de Polignac number, because 101001021221 - 2¹⁴ = 101001004837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001021223) 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, 309818921 + ... + 309819246.

It is an arithmetic number, because the mean of its divisors is an integer number (25405164888).

Almost surely, 2^101001021221 is an apocalyptic number.

It is an amenable number.

101001021221 is a deficient number, since it is larger than the sum of its proper divisors (619638331).

101001021221 is an equidigital number, since it uses as much as digits as its factorization.

101001021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619638330.

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

Adding to 101001021221 its reverse (122120100101), we get a palindrome (223121121322).

The spelling of 101001021221 in words is "one hundred one billion, one million, twenty-one thousand, two hundred twenty-one".