212323145442220 has 12 divisors (see below), whose sum is σ = 445878605428704. Its totient is φ = 84929258176880.

The previous prime is 212323145442169. The next prime is 212323145442271. The reversal of 212323145442220 is 22244541323212.

It is an interprime number because it is at equal distance from previous prime (212323145442169) and next prime (212323145442271).

It is a super-2 number, since 2×212323145442220² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212323145442220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5308078636036 + ... + 5308078636075.

It is an arithmetic number, because the mean of its divisors is an integer number (37156550452392).

Almost surely, 2^{212323145442220} is an apocalyptic number.

212323145442220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212323145442220 is an abundant number, since it is smaller than the sum of its proper divisors (233555459986484).

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

212323145442220 is a wasteful number, since it uses less digits than its factorization.

212323145442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616157272120 (or 10616157272118 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 212323145442220 its reverse (22244541323212), we get a palindrome (234567686765432).

The spelling of 212323145442220 in words is "two hundred twelve trillion, three hundred twenty-three billion, one hundred forty-five million, four hundred forty-two thousand, two hundred twenty".