120211110121 has 4 divisors (see below), whose sum is σ = 120212115012. Its totient is φ = 120210105232.

The previous prime is 120211110119. The next prime is 120211110139. The reversal of 120211110121 is 121011112021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121011112021 = 8741 ⋅13844081.

It can be written as a sum of positive squares in 2 ways, for example, as 103938536025 + 16272574096 = 322395^2 + 127564^2 .

It is a cyclic number.

It is not a de Polignac number, because 120211110121 - 2¹ = 120211110119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120211110191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294250 + ... + 571843.

It is an arithmetic number, because the mean of its divisors is an integer number (30053028753).

Almost surely, 2^120211110121 is an apocalyptic number.

It is an amenable number.

120211110121 is a deficient number, since it is larger than the sum of its proper divisors (1004891).

120211110121 is an equidigital number, since it uses as much as digits as its factorization.

120211110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004890.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120211110121 its reverse (121011112021), we get a palindrome (241222222142).

The spelling of 120211110121 in words is "one hundred twenty billion, two hundred eleven million, one hundred ten thousand, one hundred twenty-one".