2180101881 has 16 divisors (see below), whose sum is σ = 2941922304. Its totient is φ = 1435924224.

The previous prime is 2180101873. The next prime is 2180101921. The reversal of 2180101881 is 1881010812.

It is not a de Polignac number, because 2180101881 - 2³ = 2180101873 is a prime.

It is a super-2 number, since 2×2180101881² = 9505688423079476322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2180101801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97320 + ... + 117606.

It is an arithmetic number, because the mean of its divisors is an integer number (183870144).

Almost surely, 2^2180101881 is an apocalyptic number.

It is an amenable number.

2180101881 is a deficient number, since it is larger than the sum of its proper divisors (761820423).

2180101881 is a wasteful number, since it uses less digits than its factorization.

2180101881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20720.

The product of its (nonzero) digits is 1024, while the sum is 30.

The square root of 2180101881 is about 46691.5611326072. The cubic root of 2180101881 is about 1296.6584558648.

The spelling of 2180101881 in words is "two billion, one hundred eighty million, one hundred one thousand, eight hundred eighty-one".