21112120221330 has 32 divisors (see below), whose sum is σ = 50672995199424. Its totient is φ = 5629464651456.

The previous prime is 21112120221329. The next prime is 21112120221343. The reversal of 21112120221330 is 3312202121112.

It is a junction number, because it is equal to n+sod(n) for n = 21112120221297 and 21112120221306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26733964 + ... + 27512343.

It is an arithmetic number, because the mean of its divisors is an integer number (1583531099982).

Almost surely, 2^{21112120221330} is an apocalyptic number.

21112120221330 is an abundant number, since it is smaller than the sum of its proper divisors (29560874978094).

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

21112120221330 is a wasteful number, since it uses less digits than its factorization.

21112120221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54259290.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21112120221330 its reverse (3312202121112), we get a palindrome (24424322342442).

The spelling of 21112120221330 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, two hundred twenty-one thousand, three hundred thirty".