10111202202121 has 4 divisors (see below), whose sum is σ = 10111236536644. Its totient is φ = 10111167867600.

The previous prime is 10111202202103. The next prime is 10111202202197. The reversal of 10111202202121 is 12120220211101.

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 5957089711225 + 4154112490896 = 2440715^2 + 2038164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111202202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111202202095 and 10111202202104.

It is not an unprimeable number, because it can be changed into a prime (10111202272121) 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, 16721670 + ... + 17315791.

It is an arithmetic number, because the mean of its divisors is an integer number (2527809134161).

Almost surely, 2^{10111202202121} is an apocalyptic number.

It is an amenable number.

10111202202121 is a deficient number, since it is larger than the sum of its proper divisors (34334523).

10111202202121 is an equidigital number, since it uses as much as digits as its factorization.

10111202202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34334522.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10111202202121 its reverse (12120220211101), we get a palindrome (22231422413222).

The spelling of 10111202202121 in words is "ten trillion, one hundred eleven billion, two hundred two million, two hundred two thousand, one hundred twenty-one".