102111211001221 has 8 divisors (see below), whose sum is σ = 104427557568000. Its totient is φ = 99820459424400.

The previous prime is 102111211001153. The next prime is 102111211001227. The reversal of 102111211001221 is 122100112111201.

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 102111211001221 - 2¹¹ = 102111210999173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102111211001195 and 102111211001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111211001227) 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, 6398739421 + ... + 6398755378.

It is an arithmetic number, because the mean of its divisors is an integer number (13053444696000).

Almost surely, 2^{102111211001221} is an apocalyptic number.

It is an amenable number.

102111211001221 is a deficient number, since it is larger than the sum of its proper divisors (2316346566779).

102111211001221 is a wasteful number, since it uses less digits than its factorization.

102111211001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797494979.

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

Adding to 102111211001221 its reverse (122100112111201), we get a palindrome (224211323112422).

The spelling of 102111211001221 in words is "one hundred two trillion, one hundred eleven billion, two hundred eleven million, one thousand, two hundred twenty-one".