21231132030 has 96 divisors (see below), whose sum is σ = 55540779840. Its totient is φ = 5626897920.

The previous prime is 21231131963. The next prime is 21231132047. The reversal of 21231132030 is 3023113212.

21231132030 is a `hidden beast` number, since 2 + 1 + 2 + 311 + 320 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21231131994 and 21231132012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12720036 + ... + 12721704.

It is an arithmetic number, because the mean of its divisors is an integer number (578549790).

Almost surely, 2^21231132030 is an apocalyptic number.

21231132030 is an abundant number, since it is smaller than the sum of its proper divisors (34309647810).

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

21231132030 is a wasteful number, since it uses less digits than its factorization.

21231132030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466 (or 2463 counting only the distinct ones).

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

Adding to 21231132030 its reverse (3023113212), we get a palindrome (24254245242).

The spelling of 21231132030 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty-two thousand, thirty".