10111210133821 has 2 divisors, whose sum is σ = 10111210133822. Its totient is φ = 10111210133820.

The previous prime is 10111210133819. The next prime is 10111210133839. The reversal of 10111210133821 is 12833101211101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10080237653721 + 30972480100 = 3174939^2 + 175990^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111210133821 - 2¹ = 10111210133819 is a prime.

Together with 10111210133819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111210133891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055605066910 + 5055605066911.

It is an arithmetic number, because the mean of its divisors is an integer number (5055605066911).

Almost surely, 2^{10111210133821} is an apocalyptic number.

It is an amenable number.

10111210133821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111210133821 is an equidigital number, since it uses as much as digits as its factorization.

10111210133821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 10111210133821 its reverse (12833101211101), we get a palindrome (22944311344922).

The spelling of 10111210133821 in words is "ten trillion, one hundred eleven billion, two hundred ten million, one hundred thirty-three thousand, eight hundred twenty-one".