121435456056123 has 8 divisors (see below), whose sum is σ = 176633390627136. Its totient is φ = 73597246094600.

The previous prime is 121435456056107. The next prime is 121435456056149. The reversal of 121435456056123 is 321650654534121.

It is a happy number.

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 121435456056123 - 2⁴ = 121435456056107 is a prime.

It is a super-2 number, since 2×121435456056123² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121435456056193) 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, 1839931152333 + ... + 1839931152398.

It is an arithmetic number, because the mean of its divisors is an integer number (22079173828392).

Almost surely, 2^{121435456056123} is an apocalyptic number.

121435456056123 is a deficient number, since it is larger than the sum of its proper divisors (55197934571013).

121435456056123 is a wasteful number, since it uses less digits than its factorization.

121435456056123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679862304745.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 121435456056123 in words is "one hundred twenty-one trillion, four hundred thirty-five billion, four hundred fifty-six million, fifty-six thousand, one hundred twenty-three".