1121211220001 has 8 divisors (see below), whose sum is σ = 1158026323200. Its totient is φ = 1084436554320.

The previous prime is 1121211219949. The next prime is 1121211220021. The reversal of 1121211220001 is 1000221121211.

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 1121211220001 - 2¹⁴ = 1121211203617 is a prime.

It is a super-2 number, since 2×1121211220001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121211220021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10053011 + ... + 10163928.

It is an arithmetic number, because the mean of its divisors is an integer number (144753290400).

Almost surely, 2^{1121211220001} is an apocalyptic number.

It is an amenable number.

1121211220001 is a deficient number, since it is larger than the sum of its proper divisors (36815103199).

1121211220001 is a wasteful number, since it uses less digits than its factorization.

1121211220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20218759.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121211220001 its reverse (1000221121211), we get a palindrome (2121432341212).

The spelling of 1121211220001 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, one".