121011111010221 has 16 divisors (see below), whose sum is σ = 161385328728000. Its totient is φ = 80655485695488.

The previous prime is 121011111010211. The next prime is 121011111010249. The reversal of 121011111010221 is 122010111110121.

121011111010221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 121011111010221 - 2¹⁰ = 121011111009197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121011111010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011111010211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245327325 + ... + 245820093.

It is an arithmetic number, because the mean of its divisors is an integer number (10086583045500).

Almost surely, 2^{121011111010221} is an apocalyptic number.

It is an amenable number.

121011111010221 is a deficient number, since it is larger than the sum of its proper divisors (40374217717779).

121011111010221 is a wasteful number, since it uses less digits than its factorization.

121011111010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511468.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121011111010221 its reverse (122010111110121), we get a palindrome (243021222120342).

The spelling of 121011111010221 in words is "one hundred twenty-one trillion, eleven billion, one hundred eleven million, ten thousand, two hundred twenty-one".