102121222121121 has 8 divisors (see below), whose sum is σ = 155613290851264. Its totient is φ = 58354984069200.

The previous prime is 102121222121071. The next prime is 102121222121129. The reversal of 102121222121121 is 121121222121201.

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

It is not a de Polignac number, because 102121222121121 - 2¹⁰ = 102121222120097 is a prime.

It is a super-2 number, since 2×102121222121121² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 4862915339101 = 102121222121121 / (1 + 0 + 2 + 1 + 2 + 1 + 2 + 2 + 2 + 1 + 2 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121222121129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431457669530 + ... + 2431457669571.

It is an arithmetic number, because the mean of its divisors is an integer number (19451661356408).

Almost surely, 2^{102121222121121} is an apocalyptic number.

It is an amenable number.

102121222121121 is a deficient number, since it is larger than the sum of its proper divisors (53492068730143).

102121222121121 is an equidigital number, since it uses as much as digits as its factorization.

102121222121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862915339111.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 102121222121121 its reverse (121121222121201), we get a palindrome (223242444242322).

The spelling of 102121222121121 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".