12400355220 has 96 divisors (see below), whose sum is σ = 40105570176. Its totient is φ = 2829312000.

The previous prime is 12400355207. The next prime is 12400355287. The reversal of 12400355220 is 2255300421.

It is a congruent number.

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, 541381 + ... + 563820.

It is an arithmetic number, because the mean of its divisors is an integer number (417766356).

Almost surely, 2^12400355220 is an apocalyptic number.

12400355220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400355220 is an abundant number, since it is smaller than the sum of its proper divisors (27705214956).

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

12400355220 is a wasteful number, since it uses less digits than its factorization.

12400355220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105241 (or 1105239 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 12400355220 its reverse (2255300421), we get a palindrome (14655655641).

The spelling of 12400355220 in words is "twelve billion, four hundred million, three hundred fifty-five thousand, two hundred twenty".