212121032 has 8 divisors (see below), whose sum is σ = 397726950. Its totient is φ = 106060512.

The previous prime is 212121031. The next prime is 212121067. The reversal of 212121032 is 230121212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 110796676 + 101324356 = 10526^2 + 10066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×212121032³ (a number of 26 digits) contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 212120998 and 212121016.

It is not an unprimeable number, because it can be changed into a prime (212121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13257557 + ... + 13257572.

Almost surely, 2^212121032 is an apocalyptic number.

It is an amenable number.

212121032 is a deficient number, since it is larger than the sum of its proper divisors (185605918).

212121032 is a wasteful number, since it uses less digits than its factorization.

212121032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26515135 (or 26515131 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212121032 is about 14564.3754414668. The cubic root of 212121032 is about 596.3866461015.

Adding to 212121032 its reverse (230121212), we get a palindrome (442242244).

The spelling of 212121032 in words is "two hundred twelve million, one hundred twenty-one thousand, thirty-two".