212220004 has 6 divisors (see below), whose sum is σ = 371385014. Its totient is φ = 106110000.

The previous prime is 212219981. The next prime is 212220013. The reversal of 212220004 is 400022212.

212220004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 171872100 + 40347904 = 13110^2 + 6352^2 .

It is a super-4 number, since 4×212220004⁴ (a number of 34 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26527497 + ... + 26527504.

Almost surely, 2^212220004 is an apocalyptic number.

It is an amenable number.

212220004 is a deficient number, since it is larger than the sum of its proper divisors (159165010).

212220004 is a wasteful number, since it uses less digits than its factorization.

212220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53055005 (or 53055003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 212220004 is about 14567.7727879041. The cubic root of 212220004 is about 596.4793862396.

Adding to 212220004 its reverse (400022212), we get a palindrome (612242216).

The spelling of 212220004 in words is "two hundred twelve million, two hundred twenty thousand, four".