212121103030 has 16 divisors (see below), whose sum is σ = 381829068720. Its totient is φ = 84845978272.

The previous prime is 212121103027. The next prime is 212121103057. The reversal of 212121103030 is 30301121212.

It is a super-3 number, since 3×212121103030³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212121102995 and 212121103013.

It is a congruent number.

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, 76737 + ... + 655843.

It is an arithmetic number, because the mean of its divisors is an integer number (23864316795).

Almost surely, 2^212121103030 is an apocalyptic number.

212121103030 is a deficient number, since it is larger than the sum of its proper divisors (169707965690).

212121103030 is a wasteful number, since it uses less digits than its factorization.

212121103030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615743.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212121103030 its reverse (30301121212), we get a palindrome (242422224242).

The spelling of 212121103030 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred three thousand, thirty".