2191329012 has 12 divisors (see below), whose sum is σ = 5113101056. Its totient is φ = 730443000.

The previous prime is 2191329011. The next prime is 2191329013. The reversal of 2191329012 is 2109231912.

It is an interprime number because it is at equal distance from previous prime (2191329011) and next prime (2191329013).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2191329012² = 9603845677665792288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191329011) 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, 91305364 + ... + 91305387.

Almost surely, 2^2191329012 is an apocalyptic number.

It is an amenable number.

2191329012 is an abundant number, since it is smaller than the sum of its proper divisors (2921772044).

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

2191329012 is a wasteful number, since it uses less digits than its factorization.

2191329012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182610758 (or 182610756 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 2191329012 is about 46811.6332977178. The cubic root of 2191329012 is about 1298.8804981447.

It can be divided in two parts, 219 and 1329012, that added together give a palindrome (1329231).

The spelling of 2191329012 in words is "two billion, one hundred ninety-one million, three hundred twenty-nine thousand, twelve".