212223023120 has 40 divisors (see below), whose sum is σ = 510432966360. Its totient is φ = 81961994240.

The previous prime is 212223023107. The next prime is 212223023141. The reversal of 212223023120 is 21320322212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18932659216 + 193290363904 = 137596^2 + 439648^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×212223023120² (a number of 23 digits) contains 22 as substring.

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 = 212223023092 and 212223023101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45735401 + ... + 45740040.

It is an arithmetic number, because the mean of its divisors is an integer number (12760824159).

Almost surely, 2^212223023120 is an apocalyptic number.

212223023120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212223023120 is an abundant number, since it is smaller than the sum of its proper divisors (298209943240).

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

212223023120 is a wasteful number, since it uses less digits than its factorization.

212223023120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91475483 (or 91475477 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 212223023120 its reverse (21320322212), we get a palindrome (233543345332).

The spelling of 212223023120 in words is "two hundred twelve billion, two hundred twenty-three million, twenty-three thousand, one hundred twenty".