10001111111021 has 8 divisors (see below), whose sum is σ = 10014246872640. Its totient is φ = 9987977260768.

The previous prime is 10001111110993. The next prime is 10001111111077. The reversal of 10001111111021 is 12011111110001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10001111111021 - 2⁴² = 5603064599917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001111110993 and 10001111111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001111111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10148870 + ... + 11090616.

It is an arithmetic number, because the mean of its divisors is an integer number (1251780859080).

Almost surely, 2^{10001111111021} is an apocalyptic number.

It is an amenable number.

10001111111021 is a deficient number, since it is larger than the sum of its proper divisors (13135761619).

10001111111021 is an equidigital number, since it uses as much as digits as its factorization.

10001111111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955683.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 10001111111021 its reverse (12011111110001), we get a palindrome (22012222221022).

The spelling of 10001111111021 in words is "ten trillion, one billion, one hundred eleven million, one hundred eleven thousand, twenty-one".