212461101684 has 240 divisors, whose sum is σ = 612136901376. Its totient is φ = 63848736000.

The previous prime is 212461101683. The next prime is 212461101689. The reversal of 212461101684 is 486101164212.

212461101684 is a `hidden beast` number, since 2 + 1 + 24 + 611 + 0 + 16 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212461101683) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 138771999 + ... + 138773529.

Almost surely, 2^212461101684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212461101684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306068450688).

212461101684 is an abundant number, since it is smaller than the sum of its proper divisors (399675799692).

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

212461101684 is a wasteful number, since it uses less digits than its factorization.

212461101684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

Adding to 212461101684 its reverse (486101164212), we get a palindrome (698562265896).

The spelling of 212461101684 in words is "two hundred twelve billion, four hundred sixty-one million, one hundred one thousand, six hundred eighty-four".