1111203323121 has 16 divisors (see below), whose sum is σ = 1516226987264. Its totient is φ = 723494724624.

The previous prime is 1111203323107. The next prime is 1111203323231. The reversal of 1111203323121 is 1213233021111.

It is not a de Polignac number, because 1111203323121 - 2¹⁴ = 1111203306737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111203323521) 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, 716310 + ... + 1653936.

It is an arithmetic number, because the mean of its divisors is an integer number (94764186704).

Almost surely, 2^{1111203323121} is an apocalyptic number.

It is an amenable number.

1111203323121 is a deficient number, since it is larger than the sum of its proper divisors (405023664143).

1111203323121 is an equidigital number, since it uses as much as digits as its factorization.

1111203323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946860.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1111203323121 its reverse (1213233021111), we get a palindrome (2324436344232).

The spelling of 1111203323121 in words is "one trillion, one hundred eleven billion, two hundred three million, three hundred twenty-three thousand, one hundred twenty-one".