1342123111121 has 4 divisors (see below), whose sum is σ = 1445363350452. Its totient is φ = 1238882871792.

The previous prime is 1342123111111. The next prime is 1342123111123. The reversal of 1342123111121 is 1211113212431.

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 663509622721 + 678613488400 = 814561^2 + 823780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1342123111121 - 2⁶ = 1342123111057 is a prime.

It is a super-2 number, since 2×1342123111121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1342123111123) 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, 51620119646 + ... + 51620119671.

It is an arithmetic number, because the mean of its divisors is an integer number (361340837613).

Almost surely, 2^{1342123111121} is an apocalyptic number.

It is an amenable number.

1342123111121 is a deficient number, since it is larger than the sum of its proper divisors (103240239331).

1342123111121 is a wasteful number, since it uses less digits than its factorization.

1342123111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103240239330.

The product of its digits is 288, while the sum is 23.

Adding to 1342123111121 its reverse (1211113212431), we get a palindrome (2553236323552).

The spelling of 1342123111121 in words is "one trillion, three hundred forty-two billion, one hundred twenty-three million, one hundred eleven thousand, one hundred twenty-one".