10111100101021 has 4 divisors (see below), whose sum is σ = 10276855840444. Its totient is φ = 9945344361600.

The previous prime is 10111100101007. The next prime is 10111100101027. The reversal of 10111100101021 is 12010100111101.

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 4075916832100 + 6035183268921 = 2018890^2 + 2456661^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111100101021 - 2⁵ = 10111100100989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111100100989 and 10111100101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111100101027) 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, 82877869620 + ... + 82877869741.

It is an arithmetic number, because the mean of its divisors is an integer number (2569213960111).

Almost surely, 2^{10111100101021} is an apocalyptic number.

It is an amenable number.

10111100101021 is a deficient number, since it is larger than the sum of its proper divisors (165755739423).

10111100101021 is an equidigital number, since it uses as much as digits as its factorization.

10111100101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165755739422.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 10111100101021 its reverse (12010100111101), we get a palindrome (22121200212122).

The spelling of 10111100101021 in words is "ten trillion, one hundred eleven billion, one hundred million, one hundred one thousand, twenty-one".