212012100030 has 128 divisors (see below), whose sum is σ = 539657354880. Its totient is φ = 53211791360.

The previous prime is 212012100019. The next prime is 212012100037. The reversal of 212012100030 is 30001210212.

212012100030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 212012099979 and 212012100015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012100037) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79792462 + ... + 79795118.

It is an arithmetic number, because the mean of its divisors is an integer number (4216073085).

Almost surely, 2^212012100030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212012100030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269828677440).

212012100030 is an abundant number, since it is smaller than the sum of its proper divisors (327645254850).

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

212012100030 is a wasteful number, since it uses less digits than its factorization.

212012100030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4974.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 212012100030 its reverse (30001210212), we get a palindrome (242013310242).

The spelling of 212012100030 in words is "two hundred twelve billion, twelve million, one hundred thousand, thirty".