10112020100221 has 4 divisors (see below), whose sum is σ = 10889867800252. Its totient is φ = 9334172400192.

The previous prime is 10112020100213. The next prime is 10112020100233. The reversal of 10112020100221 is 12200102021101.

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 6605336907225 + 3506683192996 = 2570085^2 + 1872614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10112020100221 - 2³ = 10112020100213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 777847700017 = 10112020100221 / (1 + 0 + 1 + 1 + 2 + 0 + 2 + 0 + 1 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10112020100261) 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, 388923849996 + ... + 388923850021.

It is an arithmetic number, because the mean of its divisors is an integer number (2722466950063).

Almost surely, 2^{10112020100221} is an apocalyptic number.

It is an amenable number.

10112020100221 is a deficient number, since it is larger than the sum of its proper divisors (777847700031).

10112020100221 is an equidigital number, since it uses as much as digits as its factorization.

10112020100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777847700030.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10112020100221 its reverse (12200102021101), we get a palindrome (22312122121322).

The spelling of 10112020100221 in words is "ten trillion, one hundred twelve billion, twenty million, one hundred thousand, two hundred twenty-one".