21002002232202 has 32 divisors (see below), whose sum is σ = 46675634016960. Its totient is φ = 6999989718960.

The previous prime is 21002002232191. The next prime is 21002002232243. The reversal of 21002002232202 is 20223220020012.

21002002232202 is a `hidden beast` number, since 21 + 0 + 0 + 200 + 223 + 220 + 2 = 666.

It is a super-2 number, since 2×21002002232202² (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 15 ways as a sum of consecutive naturals, for example, 18261624 + ... + 19377587.

It is an arithmetic number, because the mean of its divisors is an integer number (1458613563030).

Almost surely, 2^{21002002232202} is an apocalyptic number.

21002002232202 is an abundant number, since it is smaller than the sum of its proper divisors (25673631784758).

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

21002002232202 is a wasteful number, since it uses less digits than its factorization.

21002002232202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37649555 (or 37649549 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21002002232202 its reverse (20223220020012), we get a palindrome (41225222252214).

The spelling of 21002002232202 in words is "twenty-one trillion, two billion, two million, two hundred thirty-two thousand, two hundred two".