12021202123 has 8 divisors (see below), whose sum is σ = 13742797280. Its totient is φ = 10300677120.

The previous prime is 12021202111. The next prime is 12021202147. The reversal of 12021202123 is 32120212021.

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 a de Polignac number, because none of the positive numbers 2^k-12021202123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021202097 and 12021202106.

It is not an unprimeable number, because it can be changed into a prime (12021202153) 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, 243318 + ... + 288523.

It is an arithmetic number, because the mean of its divisors is an integer number (1717849660).

Almost surely, 2^12021202123 is an apocalyptic number.

12021202123 is a deficient number, since it is larger than the sum of its proper divisors (1721595157).

12021202123 is an equidigital number, since it uses as much as digits as its factorization.

12021202123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535077.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12021202123 its reverse (32120212021), we get a palindrome (44141414144).

The spelling of 12021202123 in words is "twelve billion, twenty-one million, two hundred two thousand, one hundred twenty-three".