12320515221020 has 24 divisors (see below), whose sum is σ = 26361253324224. Its totient is φ = 4835221067456.

The previous prime is 12320515221017. The next prime is 12320515221023. The reversal of 12320515221020 is 2012251502321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12320515221017) and next prime (12320515221023).

It is a super-2 number, since 2×12320515221020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320515221023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5811562724 + ... + 5811564843.

It is an arithmetic number, because the mean of its divisors is an integer number (1098385555176).

Almost surely, 2^{12320515221020} is an apocalyptic number.

12320515221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12320515221020 is an abundant number, since it is smaller than the sum of its proper divisors (14040738103204).

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

12320515221020 is a wasteful number, since it uses less digits than its factorization.

12320515221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11623127629 (or 11623127627 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12320515221020 its reverse (2012251502321), we get a palindrome (14332766723341).

The spelling of 12320515221020 in words is "twelve trillion, three hundred twenty billion, five hundred fifteen million, two hundred twenty-one thousand, twenty".