28212112132 has 12 divisors (see below), whose sum is σ = 50066565696. Its totient is φ = 13907379080.

The previous prime is 28212112121. The next prime is 28212112151. The reversal of 28212112132 is 23121121282.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28212112097 and 28212112106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49668928 + ... + 49669495.

It is an arithmetic number, because the mean of its divisors is an integer number (4172213808).

Almost surely, 2^28212112132 is an apocalyptic number.

It is an amenable number.

28212112132 is a deficient number, since it is larger than the sum of its proper divisors (21854453564).

28212112132 is a wasteful number, since it uses less digits than its factorization.

28212112132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99338498 (or 99338496 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The spelling of 28212112132 in words is "twenty-eight billion, two hundred twelve million, one hundred twelve thousand, one hundred thirty-two".