121020211111021 has 8 divisors (see below), whose sum is σ = 121420786616064. Its totient is φ = 120619708959120.

The previous prime is 121020211110991. The next prime is 121020211111123. The reversal of 121020211111021 is 120111112020121.

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 121020211111021 - 2³⁵ = 120985851372653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121020211110986 and 121020211111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020211115021) 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, 15032181 + ... + 21633466.

It is an arithmetic number, because the mean of its divisors is an integer number (15177598327008).

Almost surely, 2^{121020211111021} is an apocalyptic number.

It is an amenable number.

121020211111021 is a deficient number, since it is larger than the sum of its proper divisors (400575505043).

121020211111021 is a wasteful number, since it uses less digits than its factorization.

121020211111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36676571.

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

Adding to 121020211111021 its reverse (120111112020121), we get a palindrome (241131323131142).

The spelling of 121020211111021 in words is "one hundred twenty-one trillion, twenty billion, two hundred eleven million, one hundred eleven thousand, twenty-one".