20211321330 has 24 divisors (see below), whose sum is σ = 52549435692. Its totient is φ = 5389685664.

The previous prime is 20211321329. The next prime is 20211321349. The reversal of 20211321330 is 3312311202.

20211321330 is a `hidden beast` number, since 2 + 0 + 2 + 11 + 321 + 330 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18482674401 + 1728646929 = 135951^2 + 41577^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112285029 + ... + 112285208.

Almost surely, 2^20211321330 is an apocalyptic number.

20211321330 is an abundant number, since it is smaller than the sum of its proper divisors (32338114362).

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

20211321330 is a wasteful number, since it uses less digits than its factorization.

20211321330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224570250 (or 224570247 counting only the distinct ones).

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

Adding to 20211321330 its reverse (3312311202), we get a palindrome (23523632532).

The spelling of 20211321330 in words is "twenty billion, two hundred eleven million, three hundred twenty-one thousand, three hundred thirty".