21212202210084 has 96 divisors (see below), whose sum is σ = 57386971514880. Its totient is φ = 6763157200800.

The previous prime is 21212202210083. The next prime is 21212202210103. The reversal of 21212202210084 is 48001220221212.

21212202210084 is a `hidden beast` number, since 212 + 1 + 220 + 221 + 0 + 0 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21212202210083) 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, 167634079 + ... + 167760569.

It is an arithmetic number, because the mean of its divisors is an integer number (597780953280).

Almost surely, 2^{21212202210084} is an apocalyptic number.

It is an amenable number.

21212202210084 is an abundant number, since it is smaller than the sum of its proper divisors (36174769304796).

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

21212202210084 is a wasteful number, since it uses less digits than its factorization.

21212202210084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194038 (or 194030 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 21212202210084 its reverse (48001220221212), we get a palindrome (69213422431296).

The spelling of 21212202210084 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, two hundred ten thousand, eighty-four".