21210002110202 has 4 divisors (see below), whose sum is σ = 31815003165306. Its totient is φ = 10605001055100.

The previous prime is 21210002110169. The next prime is 21210002110211. The reversal of 21210002110202 is 20201120001212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21167185809961 + 42816300241 = 4600781^2 + 206921^2 .

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 as a sum of consecutive naturals, namely, 5302500527549 + ... + 5302500527552.

Almost surely, 2^{21210002110202} is an apocalyptic number.

21210002110202 is a deficient number, since it is larger than the sum of its proper divisors (10605001055104).

21210002110202 is a wasteful number, since it uses less digits than its factorization.

21210002110202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605001055103.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210002110202 its reverse (20201120001212), we get a palindrome (41411122111414).

The spelling of 21210002110202 in words is "twenty-one trillion, two hundred ten billion, two million, one hundred ten thousand, two hundred two".