1211122110001 has 8 divisors (see below), whose sum is σ = 1233981450720. Its totient is φ = 1188403442688.

The previous prime is 1211122109971. The next prime is 1211122110047. The reversal of 1211122110001 is 1000112211121.

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 1211122110001 - 2³⁵ = 1176762371633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211122114001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35150971 + ... + 35185408.

It is an arithmetic number, because the mean of its divisors is an integer number (154247681340).

Almost surely, 2^{1211122110001} is an apocalyptic number.

It is an amenable number.

1211122110001 is a deficient number, since it is larger than the sum of its proper divisors (22859340719).

1211122110001 is an equidigital number, since it uses as much as digits as its factorization.

1211122110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70336703.

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

Adding to 1211122110001 its reverse (1000112211121), we get a palindrome (2211234321122).

The spelling of 1211122110001 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, one".