121123210323431 has 4 divisors (see below), whose sum is σ = 122234432436600. Its totient is φ = 120011988210264.

The previous prime is 121123210323293. The next prime is 121123210323503. The reversal of 121123210323431 is 134323012321121.

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

It is a cyclic number.

It is not a de Polignac number, because 121123210323431 - 2¹⁰ = 121123210322407 is a prime.

It is a super-2 number, since 2×121123210323431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121123210323394 and 121123210323403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123210323931) 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, 555611056421 + ... + 555611056638.

It is an arithmetic number, because the mean of its divisors is an integer number (30558608109150).

Almost surely, 2^{121123210323431} is an apocalyptic number.

121123210323431 is a deficient number, since it is larger than the sum of its proper divisors (1111222113169).

121123210323431 is a wasteful number, since it uses less digits than its factorization.

121123210323431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111222113168.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 121123210323431 its reverse (134323012321121), we get a palindrome (255446222644552).

The spelling of 121123210323431 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, two hundred ten million, three hundred twenty-three thousand, four hundred thirty-one".