121123120311101 has 4 divisors (see below), whose sum is σ = 121466245298172. Its totient is φ = 120779995324032.

The previous prime is 121123120311097. The next prime is 121123120311107. The reversal of 121123120311101 is 101113021321121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64527064699876 + 56596055611225 = 8032874^2 + 7523035^2 .

It is a cyclic number.

It is not a de Polignac number, because 121123120311101 - 2² = 121123120311097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123120311107) 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, 171562493006 + ... + 171562493711.

It is an arithmetic number, because the mean of its divisors is an integer number (30366561324543).

Almost surely, 2^{121123120311101} is an apocalyptic number.

It is an amenable number.

121123120311101 is a deficient number, since it is larger than the sum of its proper divisors (343124987071).

121123120311101 is an equidigital number, since it uses as much as digits as its factorization.

121123120311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343124987070.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 121123120311101 its reverse (101113021321121), we get a palindrome (222236141632222).

The spelling of 121123120311101 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, one hundred twenty million, three hundred eleven thousand, one hundred one".