101111221001 has 4 divisors (see below), whose sum is σ = 115555681152. Its totient is φ = 86666760852.

The previous prime is 101111220869. The next prime is 101111221007. The reversal of 101111221001 is 100122111101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100122111101 = 47 ⋅2130257683.

It is a de Polignac number, because none of the positive numbers 2^k-101111221001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101111221007) 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, 7222230065 + ... + 7222230078.

It is an arithmetic number, because the mean of its divisors is an integer number (28888920288).

Almost surely, 2^101111221001 is an apocalyptic number.

It is an amenable number.

101111221001 is a deficient number, since it is larger than the sum of its proper divisors (14444460151).

101111221001 is an equidigital number, since it uses as much as digits as its factorization.

101111221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14444460150.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 101111221001 its reverse (100122111101), we get a palindrome (201233332102).

The spelling of 101111221001 in words is "one hundred one billion, one hundred eleven million, two hundred twenty-one thousand, one".