21121122210010 has 16 divisors (see below), whose sum is σ = 40254374094696. Its totient is φ = 7951481302528.

The previous prime is 21121122209917. The next prime is 21121122210037. The reversal of 21121122210010 is 1001222112112.

It can be written as a sum of positive squares in 4 ways, for example, as 19152850701609 + 1968271508401 = 4376397^2 + 1402951^2 .

It is a super-2 number, since 2×21121122210010² (a number of 27 digits) contains 22 as substring.

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, 62120947507 + ... + 62120947846.

Almost surely, 2^{21121122210010} is an apocalyptic number.

21121122210010 is a deficient number, since it is larger than the sum of its proper divisors (19133251884686).

21121122210010 is a wasteful number, since it uses less digits than its factorization.

21121122210010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124241895377.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121122210010 its reverse (1001222112112), we get a palindrome (22122344322122).

The spelling of 21121122210010 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred ten thousand, ten".