121201143423 has 16 divisors (see below), whose sum is σ = 167180607840. Its totient is φ = 78043101696.

The previous prime is 121201143377. The next prime is 121201143443. The reversal of 121201143423 is 324341102121.

It is not a de Polignac number, because 121201143423 - 2¹⁴ = 121201127039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201143393 and 121201143402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201143443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3969838 + ... + 4000251.

It is an arithmetic number, because the mean of its divisors is an integer number (10448787990).

Almost surely, 2^121201143423 is an apocalyptic number.

121201143423 is a deficient number, since it is larger than the sum of its proper divisors (45979464417).

121201143423 is a wasteful number, since it uses less digits than its factorization.

121201143423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970266.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 121201143423 its reverse (324341102121), we get a palindrome (445542245544).

The spelling of 121201143423 in words is "one hundred twenty-one billion, two hundred one million, one hundred forty-three thousand, four hundred twenty-three".