110210000021021 has 4 divisors (see below), whose sum is σ = 110260999560444. Its totient is φ = 110159000481600.

The previous prime is 110210000020817. The next prime is 110210000021047. The reversal of 110210000021021 is 120120000012011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93672878325625 + 16537121695396 = 9678475^2 + 4066586^2 .

It is a cyclic number.

It is not a de Polignac number, because 110210000021021 - 2⁴² = 105811953509917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110210000020993 and 110210000021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110210000021071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25499766470 + ... + 25499770791.

It is an arithmetic number, because the mean of its divisors is an integer number (27565249890111).

Almost surely, 2^{110210000021021} is an apocalyptic number.

It is an amenable number.

110210000021021 is a deficient number, since it is larger than the sum of its proper divisors (50999539423).

110210000021021 is an equidigital number, since it uses as much as digits as its factorization.

110210000021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50999539422.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 110210000021021 its reverse (120120000012011), we get a palindrome (230330000033032).

The spelling of 110210000021021 in words is "one hundred ten trillion, two hundred ten billion, twenty-one thousand, twenty-one".