2161006212 has 12 divisors (see below), whose sum is σ = 5042347856. Its totient is φ = 720335400.

The previous prime is 2161006207. The next prime is 2161006217. The reversal of 2161006212 is 2126001612.

It is an interprime number because it is at equal distance from previous prime (2161006207) and next prime (2161006217).

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

It is not an unprimeable number, because it can be changed into a prime (2161006217) 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, 90041914 + ... + 90041937.

Almost surely, 2^2161006212 is an apocalyptic number.

It is an amenable number.

2161006212 is an abundant number, since it is smaller than the sum of its proper divisors (2881341644).

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

2161006212 is a wasteful number, since it uses less digits than its factorization.

2161006212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180083858 (or 180083856 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2161006212 is about 46486.6240116445. The cubic root of 2161006212 is about 1292.8615067513.

Adding to 2161006212 its reverse (2126001612), we get a palindrome (4287007824).

The spelling of 2161006212 in words is "two billion, one hundred sixty-one million, six thousand, two hundred twelve".