1111222101001 has 2 divisors, whose sum is σ = 1111222101002. Its totient is φ = 1111222101000.

The previous prime is 1111222100983. The next prime is 1111222101023. The reversal of 1111222101001 is 1001012221111.

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., 947071526976 + 164150574025 = 973176^2 + 405155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111222101001 - 2²⁹ = 1110685230089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111222101091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555611050500 + 555611050501.

It is an arithmetic number, because the mean of its divisors is an integer number (555611050501).

Almost surely, 2^{1111222101001} is an apocalyptic number.

It is an amenable number.

1111222101001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111222101001 is an equidigital number, since it uses as much as digits as its factorization.

1111222101001 is an evil number, because the sum of its binary digits is even.

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

Adding to 1111222101001 its reverse (1001012221111), we get a palindrome (2112234322112).

The spelling of 1111222101001 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred one thousand, one".