101221202121 has 8 divisors (see below), whose sum is σ = 145343264640. Its totient is φ = 62289970512.

The previous prime is 101221202099. The next prime is 101221202191. The reversal of 101221202121 is 121202122101.

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

It is not a de Polignac number, because 101221202121 - 2²¹ = 101219104969 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101221202121.

It is not an unprimeable number, because it can be changed into a prime (101221202191) 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, 1297707681 + ... + 1297707758.

It is an arithmetic number, because the mean of its divisors is an integer number (18167908080).

Almost surely, 2^101221202121 is an apocalyptic number.

It is an amenable number.

101221202121 is a deficient number, since it is larger than the sum of its proper divisors (44122062519).

101221202121 is a wasteful number, since it uses less digits than its factorization.

101221202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595415455.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 101221202121 its reverse (121202122101), we get a palindrome (222423324222).

The spelling of 101221202121 in words is "one hundred one billion, two hundred twenty-one million, two hundred two thousand, one hundred twenty-one".