21101030221210 has 16 divisors (see below), whose sum is σ = 37983084419016. Its totient is φ = 8440138750528.

The previous prime is 21101030221181. The next prime is 21101030221217. The reversal of 21101030221210 is 1212203010112.

It can be written as a sum of positive squares in 4 ways, for example, as 13911505014969 + 7189525206241 = 3729813^2 + 2681329^2 .

It is not an unprimeable number, because it can be changed into a prime (21101030221217) by changing a digit.

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, 33842869 + ... + 34460728.

Almost surely, 2^{21101030221210} is an apocalyptic number.

21101030221210 is a deficient number, since it is larger than the sum of its proper divisors (16882054197806).

21101030221210 is a wasteful number, since it uses less digits than its factorization.

21101030221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68334497.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21101030221210 its reverse (1212203010112), we get a palindrome (22313233231322).

The spelling of 21101030221210 in words is "twenty-one trillion, one hundred one billion, thirty million, two hundred twenty-one thousand, two hundred ten".