21101202100210 has 16 divisors (see below), whose sum is σ = 37982239462656. Its totient is φ = 8440464021808.

The previous prime is 21101202100201. The next prime is 21101202100247. The reversal of 21101202100210 is 1200120210112.

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, 4014879 + ... + 7636861.

It is an arithmetic number, because the mean of its divisors is an integer number (2373889966416).

Almost surely, 2^{21101202100210} is an apocalyptic number.

21101202100210 is a deficient number, since it is larger than the sum of its proper divisors (16881037362446).

21101202100210 is a wasteful number, since it uses less digits than its factorization.

21101202100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204577.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21101202100210 its reverse (1200120210112), we get a palindrome (22301322310322).

The spelling of 21101202100210 in words is "twenty-one trillion, one hundred one billion, two hundred two million, one hundred thousand, two hundred ten".