212227144420 has 24 divisors (see below), whose sum is σ = 447082937784. Its totient is φ = 84623060736.

The previous prime is 212227144411. The next prime is 212227144477. The reversal of 212227144420 is 24441722212.

It can be written as a sum of positive squares in 4 ways, for example, as 25305810084 + 186921334336 = 159078^2 + 432344^2 .

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, 16730817 + ... + 16743496.

It is an arithmetic number, because the mean of its divisors is an integer number (18628455741).

Almost surely, 2^212227144420 is an apocalyptic number.

212227144420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212227144420 is an abundant number, since it is smaller than the sum of its proper divisors (234855793364).

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

212227144420 is a wasteful number, since it uses less digits than its factorization.

212227144420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33474639 (or 33474637 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 31.

Adding to 212227144420 its reverse (24441722212), we get a palindrome (236668866632).

The spelling of 212227144420 in words is "two hundred twelve billion, two hundred twenty-seven million, one hundred forty-four thousand, four hundred twenty".