12040221522 has 64 divisors (see below), whose sum is σ = 28140871680. Its totient is φ = 3362700096.

The previous prime is 12040221517. The next prime is 12040221547. The reversal of 12040221522 is 22512204021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1810788 + ... + 1817424.

It is an arithmetic number, because the mean of its divisors is an integer number (439701120).

Almost surely, 2^12040221522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12040221522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14070435840).

12040221522 is an abundant number, since it is smaller than the sum of its proper divisors (16100650158).

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

12040221522 is a wasteful number, since it uses less digits than its factorization.

12040221522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 12040221522 its reverse (22512204021), we get a palindrome (34552425543).

The spelling of 12040221522 in words is "twelve billion, forty million, two hundred twenty-one thousand, five hundred twenty-two".