1111220112121 has 32 divisors (see below), whose sum is σ = 1340824043520. Its totient is φ = 899634859200.

The previous prime is 1111220112103. The next prime is 1111220112131. The reversal of 1111220112121 is 1212110221111.

It is not a de Polignac number, because 1111220112121 - 2¹⁹ = 1111219587833 is a prime.

It is a super-2 number, since 2×1111220112121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111220112095 and 1111220112104.

It is not an unprimeable number, because it can be changed into a prime (1111220112131) 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, 104757600 + ... + 104768206.

It is an arithmetic number, because the mean of its divisors is an integer number (41900751360).

Almost surely, 2^{1111220112121} is an apocalyptic number.

It is an amenable number.

1111220112121 is a deficient number, since it is larger than the sum of its proper divisors (229603931399).

1111220112121 is a wasteful number, since it uses less digits than its factorization.

1111220112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12925.

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

Adding to 1111220112121 its reverse (1212110221111), we get a palindrome (2323330333232).

The spelling of 1111220112121 in words is "one trillion, one hundred eleven billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-one".