2121024312 has 128 divisors (see below), whose sum is σ = 6805555200. Its totient is φ = 604915200.

The previous prime is 2121024277. The next prime is 2121024383. The reversal of 2121024312 is 2134201212.

It is a happy number.

2121024312 is a `hidden beast` number, since 21 + 210 + 2 + 431 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14137 + ... + 66647.

It is an arithmetic number, because the mean of its divisors is an integer number (53168400).

Almost surely, 2^2121024312 is an apocalyptic number.

2121024312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121024312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3402777600).

2121024312 is an abundant number, since it is smaller than the sum of its proper divisors (4684530888).

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

2121024312 is a wasteful number, since it uses less digits than its factorization.

2121024312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52554 (or 52544 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2121024312 is about 46054.5797071258. The cubic root of 2121024312 is about 1284.8385211956.

Adding to 2121024312 its reverse (2134201212), we get a palindrome (4255225524).

Subtracting 2121024312 from its reverse (2134201212), we obtain a square (13176900 = 3630²).

The spelling of 2121024312 in words is "two billion, one hundred twenty-one million, twenty-four thousand, three hundred twelve".