1111222121201 has 16 divisors (see below), whose sum is σ = 1139340340800. Its totient is φ = 1083371215680.

The previous prime is 1111222121189. The next prime is 1111222121263. The reversal of 1111222121201 is 1021212221111.

It is a cyclic number.

It is not a de Polignac number, because 1111222121201 - 2³⁰ = 1110148379377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111222121201.

It is not an unprimeable number, because it can be changed into a prime (1111222121501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78530075 + ... + 78544223.

It is an arithmetic number, because the mean of its divisors is an integer number (71208771300).

Almost surely, 2^{1111222121201} is an apocalyptic number.

It is an amenable number.

1111222121201 is a deficient number, since it is larger than the sum of its proper divisors (28118219599).

1111222121201 is a wasteful number, since it uses less digits than its factorization.

1111222121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23456.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1111222121201 its reverse (1021212221111), we get a palindrome (2132434342312).

The spelling of 1111222121201 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred one".