2112453667720 has 128 divisors (see below), whose sum is σ = 5442956144640. Its totient is φ = 730366109440.

The previous prime is 2112453667717. The next prime is 2112453667721. The reversal of 2112453667720 is 277663542112.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (2112453667721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1065069 + ... + 2315011.

It is an arithmetic number, because the mean of its divisors is an integer number (42523094880).

Almost surely, 2^{2112453667720} is an apocalyptic number.

2112453667720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2112453667720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721478072320).

2112453667720 is an abundant number, since it is smaller than the sum of its proper divisors (3330502476920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2112453667720 is a wasteful number, since it uses less digits than its factorization.

2112453667720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250155 (or 1250151 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 2112453667720 in words is "two trillion, one hundred twelve billion, four hundred fifty-three million, six hundred sixty-seven thousand, seven hundred twenty".