121434213123 has 16 divisors (see below), whose sum is σ = 180649031200. Its totient is φ = 80620220160.

The previous prime is 121434213091. The next prime is 121434213133. The reversal of 121434213123 is 321312434121.

121434213123 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 342 + 1 + 312 + 3 = 666.

It is not a de Polignac number, because 121434213123 - 2⁵ = 121434213091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121434213133) 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, 9324538 + ... + 9337551.

It is an arithmetic number, because the mean of its divisors is an integer number (11290564450).

Almost surely, 2^121434213123 is an apocalyptic number.

121434213123 is a deficient number, since it is larger than the sum of its proper divisors (59214818077).

121434213123 is a wasteful number, since it uses less digits than its factorization.

121434213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18662339 (or 18662333 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 121434213123 its reverse (321312434121), we get a palindrome (442746647244).

The spelling of 121434213123 in words is "one hundred twenty-one billion, four hundred thirty-four million, two hundred thirteen thousand, one hundred twenty-three".