21000000020210 has 16 divisors (see below), whose sum is σ = 37800620289792. Its totient is φ = 8399862174000.

The previous prime is 21000000020173. The next prime is 21000000020239. The reversal of 21000000020210 is 1202000000012.

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 7 ways as a sum of consecutive naturals, for example, 16588226 + ... + 17809245.

It is an arithmetic number, because the mean of its divisors is an integer number (2362538768112).

Almost surely, 2^{21000000020210} is an apocalyptic number.

21000000020210 is a deficient number, since it is larger than the sum of its proper divisors (16800620269582).

21000000020210 is a wasteful number, since it uses less digits than its factorization.

21000000020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34458529.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 21000000020210 its reverse (1202000000012), we get a palindrome (22202000020222).

The spelling of 21000000020210 in words is "twenty-one trillion, twenty thousand, two hundred ten".