1111401043221 has 32 divisors (see below), whose sum is σ = 1739446325248. Its totient is φ = 617882437440.

The previous prime is 1111401043177. The next prime is 1111401043237. The reversal of 1111401043221 is 1223401041111.

It is not a de Polignac number, because 1111401043221 - 2¹⁰ = 1111401042197 is a prime.

It is a super-2 number, since 2×1111401043221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111401043021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15615606 + ... + 15686616.

It is an arithmetic number, because the mean of its divisors is an integer number (54357697664).

Almost surely, 2^{1111401043221} is an apocalyptic number.

It is an amenable number.

1111401043221 is a deficient number, since it is larger than the sum of its proper divisors (628045282027).

1111401043221 is a wasteful number, since it uses less digits than its factorization.

1111401043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91201.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 1111401043221 its reverse (1223401041111), we get a palindrome (2334802084332).

The spelling of 1111401043221 in words is "one trillion, one hundred eleven billion, four hundred one million, forty-three thousand, two hundred twenty-one".