1001111222101 has 4 divisors (see below), whose sum is σ = 1006352642304. Its totient is φ = 995869801900.

The previous prime is 1001111222081. The next prime is 1001111222179. The reversal of 1001111222101 is 1012221111001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001111222101 - 2¹⁵ = 1001111189333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001111228101) 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, 2620709815 + ... + 2620710196.

It is an arithmetic number, because the mean of its divisors is an integer number (251588160576).

Almost surely, 2^{1001111222101} is an apocalyptic number.

It is an amenable number.

1001111222101 is a deficient number, since it is larger than the sum of its proper divisors (5241420203).

1001111222101 is an equidigital number, since it uses as much as digits as its factorization.

1001111222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5241420202.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001111222101 its reverse (1012221111001), we get a palindrome (2013332333102).

The spelling of 1001111222101 in words is "one trillion, one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred one".