2131212223320 has 64 divisors (see below), whose sum is σ = 6566437674720. Its totient is φ = 552963170304.

The previous prime is 2131212223319. The next prime is 2131212223363. The reversal of 2131212223320 is 233222121312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239996937 + ... + 240005816.

Almost surely, 2^{2131212223320} is an apocalyptic number.

2131212223320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131212223320 is an abundant number, since it is smaller than the sum of its proper divisors (4435225451400).

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

2131212223320 is a wasteful number, since it uses less digits than its factorization.

2131212223320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480002804 (or 480002800 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 2131212223320 its reverse (233222121312), we get a palindrome (2364434344632).

It can be divided in two parts, 2131212 and 223320, that added together give a palindrome (2354532).

The spelling of 2131212223320 in words is "two trillion, one hundred thirty-one billion, two hundred twelve million, two hundred twenty-three thousand, three hundred twenty".