121202440123 has 8 divisors (see below), whose sum is σ = 129426410880. Its totient is φ = 113248107840.

The previous prime is 121202440109. The next prime is 121202440133. The reversal of 121202440123 is 321044202121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121202440123 - 2²¹ = 121200342971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202440094 and 121202440103.

It is not an unprimeable number, because it can be changed into a prime (121202440103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67408690 + ... + 67410487.

It is an arithmetic number, because the mean of its divisors is an integer number (16178301360).

Almost surely, 2^121202440123 is an apocalyptic number.

121202440123 is a deficient number, since it is larger than the sum of its proper divisors (8223970757).

121202440123 is a wasteful number, since it uses less digits than its factorization.

121202440123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134819237.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 121202440123 its reverse (321044202121), we get a palindrome (442246642244).

The spelling of 121202440123 in words is "one hundred twenty-one billion, two hundred two million, four hundred forty thousand, one hundred twenty-three".