2121123132 has 24 divisors (see below), whose sum is σ = 5499208400. Its totient is φ = 707041008.

The previous prime is 2121123131. The next prime is 2121123163. The reversal of 2121123132 is 2313211212.

It is a super-2 number, since 2×2121123132² = 8998326682210978848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121123131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9819907 + ... + 9820122.

Almost surely, 2^2121123132 is an apocalyptic number.

It is an amenable number.

2121123132 is an abundant number, since it is smaller than the sum of its proper divisors (3378085268).

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

2121123132 is a wasteful number, since it uses less digits than its factorization.

2121123132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19640042 (or 19640034 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2121123132 is about 46055.6525521027. The cubic root of 2121123132 is about 1284.8584747262.

Adding to 2121123132 its reverse (2313211212), we get a palindrome (4434334344).

The spelling of 2121123132 in words is "two billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty-two".