212121000102 has 64 divisors (see below), whose sum is σ = 473795562240. Its totient is φ = 62754652800.

The previous prime is 212121000067. The next prime is 212121000103. The reversal of 212121000102 is 201000121212.

It is a super-3 number, since 3×212121000102³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121000103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6422952 + ... + 6455892.

It is an arithmetic number, because the mean of its divisors is an integer number (7403055660).

Almost surely, 2^212121000102 is an apocalyptic number.

212121000102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212121000102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236897781120).

212121000102 is an abundant number, since it is smaller than the sum of its proper divisors (261674562138).

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

212121000102 is a wasteful number, since it uses less digits than its factorization.

212121000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35269.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 212121000102 its reverse (201000121212), we get a palindrome (413121121314).

The spelling of 212121000102 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred two", and thus it is an aban number.