213123112212420 has 48 divisors (see below), whose sum is σ = 663049682440320. Its totient is φ = 56832829923168.

The previous prime is 213123112212389. The next prime is 213123112212449. The reversal of 213123112212420 is 24212211321312.

213123112212420 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 3 + 11 + 221 + 2 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 197336214472 + ... + 197336215551.

It is an arithmetic number, because the mean of its divisors is an integer number (13813535050840).

Almost surely, 2^{213123112212420} is an apocalyptic number.

213123112212420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213123112212420 is an abundant number, since it is smaller than the sum of its proper divisors (449926570227900).

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

213123112212420 is a wasteful number, since it uses less digits than its factorization.

213123112212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394672430041 (or 394672430033 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 213123112212420 its reverse (24212211321312), we get a palindrome (237335323533732).

The spelling of 213123112212420 in words is "two hundred thirteen trillion, one hundred twenty-three billion, one hundred twelve million, two hundred twelve thousand, four hundred twenty".