2021311332 has 72 divisors (see below), whose sum is σ = 5265676416. Its totient is φ = 653292864.

The previous prime is 2021311309. The next prime is 2021311337. The reversal of 2021311332 is 2331131202.

2021311332 is a `hidden beast` number, since 2 + 0 + 21 + 311 + 332 = 666.

2021311332 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2021311332² = 8171399001743228448, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2021311337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 406453 + ... + 411395.

Almost surely, 2^2021311332 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 2021311332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632838208).

2021311332 is an abundant number, since it is smaller than the sum of its proper divisors (3244365084).

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

2021311332 is a wasteful number, since it uses less digits than its factorization.

2021311332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297 (or 5292 counting only the distinct ones).

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

The square root of 2021311332 is about 44958.9961186857. The cubic root of 2021311332 is about 1264.3803475709.

Adding to 2021311332 its reverse (2331131202), we get a palindrome (4352442534).

The spelling of 2021311332 in words is "two billion, twenty-one million, three hundred eleven thousand, three hundred thirty-two".