2152122661 has 16 divisors (see below), whose sum is σ = 2353478400. Its totient is φ = 1956022848.

The previous prime is 2152122659. The next prime is 2152122691. The reversal of 2152122661 is 1662212512.

It is not a de Polignac number, because 2152122661 - 2¹ = 2152122659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152122601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396810 + ... + 402196.

It is an arithmetic number, because the mean of its divisors is an integer number (147092400).

Almost surely, 2^2152122661 is an apocalyptic number.

It is an amenable number.

2152122661 is a deficient number, since it is larger than the sum of its proper divisors (201355739).

2152122661 is a wasteful number, since it uses less digits than its factorization.

2152122661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5868.

The product of its digits is 2880, while the sum is 28.

The square root of 2152122661 is about 46390.9760729390. The cubic root of 2152122661 is about 1291.0874913181.

The spelling of 2152122661 in words is "two billion, one hundred fifty-two million, one hundred twenty-two thousand, six hundred sixty-one".