2181944869041 has 8 divisors (see below), whose sum is σ = 3324868371904. Its totient is φ = 1246825639440.

The previous prime is 2181944869021. The next prime is 2181944869061. The reversal of 2181944869041 is 1409684491812.

It is an interprime number because it is at equal distance from previous prime (2181944869021) and next prime (2181944869061).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2181944869041 - 2²² = 2181940674737 is a prime.

It is a super-3 number, since 3×2181944869041³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2181944869021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51951068290 + ... + 51951068331.

It is an arithmetic number, because the mean of its divisors is an integer number (415608546488).

Almost surely, 2^{2181944869041} is an apocalyptic number.

2181944869041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2181944869041 is a deficient number, since it is larger than the sum of its proper divisors (1142923502863).

2181944869041 is a wasteful number, since it uses less digits than its factorization.

2181944869041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103902136631.

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 2181944869041 in words is "two trillion, one hundred eighty-one billion, nine hundred forty-four million, eight hundred sixty-nine thousand, forty-one".