121102102120021 has 8 divisors (see below), whose sum is σ = 137855357354304. Its totient is φ = 105306175756320.

The previous prime is 121102102120009. The next prime is 121102102120057. The reversal of 121102102120021 is 120021201201121.

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

It is not a de Polignac number, because 121102102120021 - 2⁵ = 121102102119989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121102102119977 and 121102102120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102102120421) 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, 239332217376 + ... + 239332217881.

It is an arithmetic number, because the mean of its divisors is an integer number (17231919669288).

Almost surely, 2^{121102102120021} is an apocalyptic number.

121102102120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121102102120021 is a deficient number, since it is larger than the sum of its proper divisors (16753255234283).

121102102120021 is a wasteful number, since it uses less digits than its factorization.

121102102120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478664435291.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121102102120021 its reverse (120021201201121), we get a palindrome (241123303321142).

The spelling of 121102102120021 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred two million, one hundred twenty thousand, twenty-one".