212121021102 has 32 divisors (see below), whose sum is σ = 425924739072. Its totient is φ = 70427109984.

The previous prime is 212121021061. The next prime is 212121021113. The reversal of 212121021102 is 201120121212.

It is a super-3 number, since 3×212121021102³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478803 + ... + 1615889.

It is an arithmetic number, because the mean of its divisors is an integer number (13310148096).

Almost surely, 2^212121021102 is an apocalyptic number.

212121021102 is an abundant number, since it is smaller than the sum of its proper divisors (213803717970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121021102 is a wasteful number, since it uses less digits than its factorization.

212121021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138112.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212121021102 its reverse (201120121212), we get a palindrome (413241142314).

The spelling of 212121021102 in words is "two hundred twelve billion, one hundred twenty-one million, twenty-one thousand, one hundred two".