121131102123 has 6 divisors (see below), whose sum is σ = 174967147524. Its totient is φ = 80754068076.

The previous prime is 121131102119. The next prime is 121131102139. The reversal of 121131102123 is 321201131121.

It is not a de Polignac number, because 121131102123 - 2² = 121131102119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121131102096 and 121131102105.

It is not an unprimeable number, because it can be changed into a prime (121131101123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6729505665 + ... + 6729505682.

It is an arithmetic number, because the mean of its divisors is an integer number (29161191254).

Almost surely, 2^121131102123 is an apocalyptic number.

121131102123 is a deficient number, since it is larger than the sum of its proper divisors (53836045401).

121131102123 is a wasteful number, since it uses less digits than its factorization.

121131102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13459011353 (or 13459011350 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121131102123 its reverse (321201131121), we get a palindrome (442332233244).

The spelling of 121131102123 in words is "one hundred twenty-one billion, one hundred thirty-one million, one hundred two thousand, one hundred twenty-three".