12210020442 has 48 divisors (see below), whose sum is σ = 27983487168. Its totient is φ = 3839711040.

The previous prime is 12210020401. The next prime is 12210020447. The reversal of 12210020442 is 24402001221.

12210020442 is a `hidden beast` number, since 1 + 221 + 0 + 0 + 2 + 0 + 442 = 666.

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 (12210020447) 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, 171784 + ... + 232227.

It is an arithmetic number, because the mean of its divisors is an integer number (582989316).

Almost surely, 2^12210020442 is an apocalyptic number.

12210020442 is an abundant number, since it is smaller than the sum of its proper divisors (15773466726).

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

12210020442 is a wasteful number, since it uses less digits than its factorization.

12210020442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404115 (or 404112 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12210020442 its reverse (24402001221), we get a palindrome (36612021663).

The spelling of 12210020442 in words is "twelve billion, two hundred ten million, twenty thousand, four hundred forty-two".