1111100022121 has 16 divisors (see below), whose sum is σ = 1139627059200. Its totient is φ = 1082935900800.

The previous prime is 1111100022083. The next prime is 1111100022233. The reversal of 1111100022121 is 1212200011111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1111100022121 - 2¹³ = 1111100013929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111100022821) 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, 4291800 + ... + 4543318.

It is an arithmetic number, because the mean of its divisors is an integer number (71226691200).

Almost surely, 2^{1111100022121} is an apocalyptic number.

It is an amenable number.

1111100022121 is a deficient number, since it is larger than the sum of its proper divisors (28527037079).

1111100022121 is a wasteful number, since it uses less digits than its factorization.

1111100022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252240.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1111100022121 its reverse (1212200011111), we get a palindrome (2323300033232).

The spelling of 1111100022121 in words is "one trillion, one hundred eleven billion, one hundred million, twenty-two thousand, one hundred twenty-one".