12121220032 has 14 divisors (see below), whose sum is σ = 24053046128. Its totient is φ = 6060609984.

The previous prime is 12121220029. The next prime is 12121220063. The reversal of 12121220032 is 23002212121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 12121219988 and 12121220015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94696968 + ... + 94697095.

Almost surely, 2^12121220032 is an apocalyptic number.

It is an amenable number.

12121220032 is a deficient number, since it is larger than the sum of its proper divisors (11931826096).

12121220032 is an equidigital number, since it uses as much as digits as its factorization.

12121220032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189394075 (or 189394065 counting only the distinct ones).

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

Adding to 12121220032 its reverse (23002212121), we get a palindrome (35123432153).

The spelling of 12121220032 in words is "twelve billion, one hundred twenty-one million, two hundred twenty thousand, thirty-two".