21021200012110 has 16 divisors (see below), whose sum is σ = 37846832610096. Its totient is φ = 8406552763008.

The previous prime is 21021200012093. The next prime is 21021200012117. The reversal of 21021200012110 is 1121000212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021200012117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240859419 + ... + 240946678.

It is an arithmetic number, because the mean of its divisors is an integer number (2365427038131).

Almost surely, 2^{21021200012110} is an apocalyptic number.

21021200012110 is a deficient number, since it is larger than the sum of its proper divisors (16825632597986).

21021200012110 is a wasteful number, since it uses less digits than its factorization.

21021200012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481810467.

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

Adding to 21021200012110 its reverse (1121000212012), we get a palindrome (22142200224122).

The spelling of 21021200012110 in words is "twenty-one trillion, twenty-one billion, two hundred million, twelve thousand, one hundred ten".