10120210011221 has 4 divisors (see below), whose sum is σ = 10220410110444. Its totient is φ = 10020009912000.

The previous prime is 10120210011161. The next prime is 10120210011271. The reversal of 10120210011221 is 12211001202101.

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 6118889902321 + 4001320108900 = 2473639^2 + 2000330^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120210011221 - 2⁶ = 10120210011157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120210011196 and 10120210011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120210011271) 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, 50100049460 + ... + 50100049661.

It is an arithmetic number, because the mean of its divisors is an integer number (2555102527611).

Almost surely, 2^{10120210011221} is an apocalyptic number.

It is an amenable number.

10120210011221 is a deficient number, since it is larger than the sum of its proper divisors (100200099223).

10120210011221 is a wasteful number, since it uses less digits than its factorization.

10120210011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100200099222.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10120210011221 its reverse (12211001202101), we get a palindrome (22331211213322).

The spelling of 10120210011221 in words is "ten trillion, one hundred twenty billion, two hundred ten million, eleven thousand, two hundred twenty-one".