101021001221 has 4 divisors (see below), whose sum is σ = 115452572832. Its totient is φ = 86589429612.

The previous prime is 101021001209. The next prime is 101021001241. The reversal of 101021001221 is 122100120101.

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 not a de Polignac number, because 101021001221 - 2¹⁴ = 101020984837 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 (101021001241) 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, 7215785795 + ... + 7215785808.

It is an arithmetic number, because the mean of its divisors is an integer number (28863143208).

Almost surely, 2^101021001221 is an apocalyptic number.

It is an amenable number.

101021001221 is a deficient number, since it is larger than the sum of its proper divisors (14431571611).

101021001221 is an equidigital number, since it uses as much as digits as its factorization.

101021001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14431571610.

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

Adding to 101021001221 its reverse (122100120101), we get a palindrome (223121121322).

The spelling of 101021001221 in words is "one hundred one billion, twenty-one million, one thousand, two hundred twenty-one".