21010121110010 has 16 divisors (see below), whose sum is σ = 37822414123656. Its totient is φ = 8403115971648.

The previous prime is 21010121109977. The next prime is 21010121110019. The reversal of 21010121110010 is 1001112101012.

It can be written as a sum of positive squares in 4 ways, for example, as 12683277926881 + 8326843183129 = 3561359^2 + 2885627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21010121109973 and 21010121110000.

It is not an unprimeable number, because it can be changed into a prime (21010121110019) 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, 116464409 + ... + 116644668.

Almost surely, 2^{21010121110010} is an apocalyptic number.

21010121110010 is a deficient number, since it is larger than the sum of its proper divisors (16812293013646).

21010121110010 is a wasteful number, since it uses less digits than its factorization.

21010121110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233118097.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21010121110010 its reverse (1001112101012), we get a palindrome (22011233211022).

The spelling of 21010121110010 in words is "twenty-one trillion, ten billion, one hundred twenty-one million, one hundred ten thousand, ten".