2111943448872 has 448 divisors, whose sum is σ = 6273979578000. Its totient is φ = 665202585600.

The previous prime is 2111943448831. The next prime is 2111943448883. The reversal of 2111943448872 is 2788443491112.

It is a happy number.

2111943448872 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 94 + 3 + 4 + 488 + 72 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 37980552996 + 2073962895876 = 194886^2 + 1440126^2 .

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2775220972 + ... + 2775221732.

Almost surely, 2^{2111943448872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111943448872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3136989789000).

2111943448872 is an abundant number, since it is smaller than the sum of its proper divisors (4162036129128).

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

2111943448872 is a wasteful number, since it uses less digits than its factorization.

2111943448872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1125 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 2111943448872 in words is "two trillion, one hundred eleven billion, nine hundred forty-three million, four hundred forty-eight thousand, eight hundred seventy-two".