121522504554123 has 4 divisors (see below), whose sum is σ = 162030006072168. Its totient is φ = 81015003036080.

The previous prime is 121522504554107. The next prime is 121522504554133. The reversal of 121522504554123 is 321455405225121.

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 121522504554123 - 2⁴ = 121522504554107 is a prime.

It is a super-2 number, since 2×121522504554123² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121522504554133) 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, 20253750759018 + ... + 20253750759023.

It is an arithmetic number, because the mean of its divisors is an integer number (40507501518042).

Almost surely, 2^{121522504554123} is an apocalyptic number.

121522504554123 is a deficient number, since it is larger than the sum of its proper divisors (40507501518045).

121522504554123 is an equidigital number, since it uses as much as digits as its factorization.

121522504554123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40507501518044.

The product of its (nonzero) digits is 480000, while the sum is 42.

Adding to 121522504554123 its reverse (321455405225121), we get a palindrome (442977909779244).

The spelling of 121522504554123 in words is "one hundred twenty-one trillion, five hundred twenty-two billion, five hundred four million, five hundred fifty-four thousand, one hundred twenty-three".