12021415040 has 32 divisors (see below), whose sum is σ = 28738696860. Its totient is φ = 4808565760.

The previous prime is 12021415039. The next prime is 12021415051. The reversal of 12021415040 is 4051412021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11624289856 + 397125184 = 107816^2 + 19928^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9391091 + ... + 9392370.

Almost surely, 2^12021415040 is an apocalyptic number.

12021415040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021415040 is an abundant number, since it is smaller than the sum of its proper divisors (16717281820).

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

12021415040 is an equidigital number, since it uses as much as digits as its factorization.

12021415040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18783480 (or 18783468 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 12021415040 its reverse (4051412021), we get a palindrome (16072827061).

The spelling of 12021415040 in words is "twelve billion, twenty-one million, four hundred fifteen thousand, forty".