21212202130002 has 80 divisors (see below), whose sum is σ = 51256176269760. Its totient is φ = 6518046513888.

The previous prime is 21212202129991. The next prime is 21212202130061. The reversal of 21212202130002 is 20003120221212.

21212202130002 is a `hidden beast` number, since 2 + 121 + 220 + 21 + 300 + 0 + 2 = 666.

It is a super-2 number, since 2×21212202130002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5213352 + ... + 8342867.

It is an arithmetic number, because the mean of its divisors is an integer number (640702203372).

Almost surely, 2^{21212202130002} is an apocalyptic number.

21212202130002 is an abundant number, since it is smaller than the sum of its proper divisors (30043974139758).

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

21212202130002 is a wasteful number, since it uses less digits than its factorization.

21212202130002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13556989 (or 13556980 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21212202130002 its reverse (20003120221212), we get a palindrome (41215322351214).

The spelling of 21212202130002 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred thirty thousand, two".