2121662196 has 36 divisors (see below), whose sum is σ = 5536096384. Its totient is φ = 684406800.

The previous prime is 2121662171. The next prime is 2121662197. The reversal of 2121662196 is 6912661212.

2121662196 is a `hidden beast` number, since 2 + 1 + 21 + 6 + 621 + 9 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2121662196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121662197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 949450 + ... + 951681.

Almost surely, 2^2121662196 is an apocalyptic number.

It is an amenable number.

2121662196 is an abundant number, since it is smaller than the sum of its proper divisors (3414434188).

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

2121662196 is a wasteful number, since it uses less digits than its factorization.

2121662196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901172 (or 1901167 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2121662196 is about 46061.5044912777. The cubic root of 2121662196 is about 1284.9673105080.

The spelling of 2121662196 in words is "two billion, one hundred twenty-one million, six hundred sixty-two thousand, one hundred ninety-six".