212121002 has 16 divisors (see below), whose sum is σ = 337458312. Its totient is φ = 99655680.

The previous prime is 212120983. The next prime is 212121023. The reversal of 212121002 is 200121212.

It is a happy number.

212121002 is digitally balanced in base 2, 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 4 ways, for example, as 203889841 + 8231161 = 14279^2 + 2869^2 .

It is a super-3 number, since 3×212121002³ (a number of 26 digits) contains 333 as substring.

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, 16928 + ... + 26660.

Almost surely, 2^212121002 is an apocalyptic number.

212121002 is a deficient number, since it is larger than the sum of its proper divisors (125337310).

212121002 is a wasteful number, since it uses less digits than its factorization.

212121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10393.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 212121002 is about 14564.3744115564. The cubic root of 212121002 is about 596.3866179861.

Adding to 212121002 its reverse (200121212), we get a palindrome (412242214).

The spelling of 212121002 in words is "two hundred twelve million, one hundred twenty-one thousand, two".