21112020330 has 32 divisors (see below), whose sum is σ = 50756704704. Its totient is φ = 5620110336.

The previous prime is 21112020301. The next prime is 21112020337. The reversal of 21112020330 is 3302021112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21112020337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592512 + ... + 627131.

It is an arithmetic number, because the mean of its divisors is an integer number (1586147022).

Almost surely, 2^21112020330 is an apocalyptic number.

21112020330 is an abundant number, since it is smaller than the sum of its proper divisors (29644684374).

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

21112020330 is a wasteful number, since it uses less digits than its factorization.

21112020330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220230.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21112020330 its reverse (3302021112), we get a palindrome (24414041442).

The spelling of 21112020330 in words is "twenty-one billion, one hundred twelve million, twenty thousand, three hundred thirty".