2121031332 has 192 divisors, whose sum is σ = 6700646400. Its totient is φ = 573798816.

The previous prime is 2121031331. The next prime is 2121031343. The reversal of 2121031332 is 2331301212.

It is a super-2 number, since 2×2121031332² = 8997547822651388448, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121031331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1162573 + ... + 1164395.

It is an arithmetic number, because the mean of its divisors is an integer number (34899200).

Almost surely, 2^2121031332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121031332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3350323200).

2121031332 is an abundant number, since it is smaller than the sum of its proper divisors (4579615068).

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

2121031332 is a wasteful number, since it uses less digits than its factorization.

2121031332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2121031332 is about 46054.6559209815. The cubic root of 2121031332 is about 1284.8399386800.

Adding to 2121031332 its reverse (2331301212), we get a palindrome (4452332544).

The spelling of 2121031332 in words is "two billion, one hundred twenty-one million, thirty-one thousand, three hundred thirty-two".