2112256688609 has 4 divisors (see below), whose sum is σ = 2112564470016. Its totient is φ = 2111948907204.

The previous prime is 2112256688561. The next prime is 2112256688617. The reversal of 2112256688609 is 9068866522112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2112256688609 - 2³⁶ = 2043537211873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112256684609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153880409 + ... + 153894134.

It is an arithmetic number, because the mean of its divisors is an integer number (528141117504).

Almost surely, 2^{2112256688609} is an apocalyptic number.

It is an amenable number.

2112256688609 is a deficient number, since it is larger than the sum of its proper divisors (307781407).

2112256688609 is an equidigital number, since it uses as much as digits as its factorization.

2112256688609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307781406.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 2112256688609 in words is "two trillion, one hundred twelve billion, two hundred fifty-six million, six hundred eighty-eight thousand, six hundred nine".