212120111204 has 24 divisors (see below), whose sum is σ = 380523349080. Its totient is φ = 103431803904.

The previous prime is 212120111171. The next prime is 212120111219. The reversal of 212120111204 is 402111021212.

It can be written as a sum of positive squares in 4 ways, for example, as 245862400 + 211874248804 = 15680^2 + 460298^2 .

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, 4055129 + ... + 4107104.

It is an arithmetic number, because the mean of its divisors is an integer number (15855139545).

Almost surely, 2^212120111204 is an apocalyptic number.

It is an amenable number.

212120111204 is a deficient number, since it is larger than the sum of its proper divisors (168403237876).

212120111204 is a wasteful number, since it uses less digits than its factorization.

212120111204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8162399 (or 8162397 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212120111204 its reverse (402111021212), we get a palindrome (614231132416).

The spelling of 212120111204 in words is "two hundred twelve billion, one hundred twenty million, one hundred eleven thousand, two hundred four".