121201023213123 has 64 divisors (see below), whose sum is σ = 186906065283072. Its totient is φ = 68428654156800.

The previous prime is 121201023213119. The next prime is 121201023213163. The reversal of 121201023213123 is 321312320102121.

It is not a de Polignac number, because 121201023213123 - 2² = 121201023213119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201023213093 and 121201023213102.

It is not an unprimeable number, because it can be changed into a prime (121201023213103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2986477090 + ... + 2986517672.

It is an arithmetic number, because the mean of its divisors is an integer number (2920407270048).

Almost surely, 2^{121201023213123} is an apocalyptic number.

121201023213123 is a deficient number, since it is larger than the sum of its proper divisors (65705042069949).

121201023213123 is a wasteful number, since it uses less digits than its factorization.

121201023213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43604.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 121201023213123 its reverse (321312320102121), we get a palindrome (442513343315244).

The spelling of 121201023213123 in words is "one hundred twenty-one trillion, two hundred one billion, twenty-three million, two hundred thirteen thousand, one hundred twenty-three".