212223023120420 has 48 divisors (see below), whose sum is σ = 491656639704048. Its totient is φ = 76448068362240.

The previous prime is 212223023120413. The next prime is 212223023120467. The reversal of 212223023120420 is 24021320322212.

It can be written as a sum of positive squares in 8 ways, for example, as 57098788027876 + 155124235092544 = 7556374^2 + 12454888^2 .

It is a super-2 number, since 2×212223023120420² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 212223023120420.

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, 9954164909 + ... + 9954186228.

It is an arithmetic number, because the mean of its divisors is an integer number (10242846660501).

Almost surely, 2^{212223023120420} is an apocalyptic number.

212223023120420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212223023120420 is an abundant number, since it is smaller than the sum of its proper divisors (279433616583628).

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

212223023120420 is a wasteful number, since it uses less digits than its factorization.

212223023120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19908351200 (or 19908351198 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 212223023120420 its reverse (24021320322212), we get a palindrome (236244343442632).

The spelling of 212223023120420 in words is "two hundred twelve trillion, two hundred twenty-three billion, twenty-three million, one hundred twenty thousand, four hundred twenty".