101221001221 has 8 divisors (see below), whose sum is σ = 101904451040. Its totient is φ = 100538041968.

The previous prime is 101221001209. The next prime is 101221001303. The reversal of 101221001221 is 122100122101.

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

It is a cyclic number.

It is not a de Polignac number, because 101221001221 - 2¹⁹ = 101220476933 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 (101221001821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296230 + ... + 538696.

It is an arithmetic number, because the mean of its divisors is an integer number (12738056380).

Almost surely, 2^101221001221 is an apocalyptic number.

It is an amenable number.

101221001221 is a deficient number, since it is larger than the sum of its proper divisors (683449819).

101221001221 is a wasteful number, since it uses less digits than its factorization.

101221001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245283.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101221001221 its reverse (122100122101), we get a palindrome (223321123322).

The spelling of 101221001221 in words is "one hundred one billion, two hundred twenty-one million, one thousand, two hundred twenty-one".