12021310310420 has 48 divisors (see below), whose sum is σ = 25927464371088. Its totient is φ = 4678487838720.

The previous prime is 12021310310363. The next prime is 12021310310441. The reversal of 12021310310420 is 2401301312021.

It can be written as a sum of positive squares in 8 ways, for example, as 369000362116 + 11652309948304 = 607454^2 + 3413548^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12021310310392 and 12021310310401.

It is a congruent number.

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, 71676260 + ... + 71843780.

It is an arithmetic number, because the mean of its divisors is an integer number (540155507731).

Almost surely, 2^{12021310310420} is an apocalyptic number.

12021310310420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021310310420 is an abundant number, since it is smaller than the sum of its proper divisors (13906154060668).

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

12021310310420 is a wasteful number, since it uses less digits than its factorization.

12021310310420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264540 (or 264538 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12021310310420 its reverse (2401301312021), we get a palindrome (14422611622441).

The spelling of 12021310310420 in words is "twelve trillion, twenty-one billion, three hundred ten million, three hundred ten thousand, four hundred twenty".