10120121010221 has 4 divisors (see below), whose sum is σ = 10121190686844. Its totient is φ = 10119051333600.

The previous prime is 10120121010217. The next prime is 10120121010269. The reversal of 10120121010221 is 12201012102101.

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 7574136973225 + 2545984036996 = 2752115^2 + 1595614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120121010221 - 2² = 10120121010217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120121010196 and 10120121010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120121013221) 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, 534824120 + ... + 534843041.

It is an arithmetic number, because the mean of its divisors is an integer number (2530297671711).

Almost surely, 2^{10120121010221} is an apocalyptic number.

It is an amenable number.

10120121010221 is a deficient number, since it is larger than the sum of its proper divisors (1069676623).

10120121010221 is an equidigital number, since it uses as much as digits as its factorization.

10120121010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069676622.

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

Adding to 10120121010221 its reverse (12201012102101), we get a palindrome (22321133112322).

The spelling of 10120121010221 in words is "ten trillion, one hundred twenty billion, one hundred twenty-one million, ten thousand, two hundred twenty-one".