1111120002121 has 4 divisors (see below), whose sum is σ = 1111201553872. Its totient is φ = 1111038450372.

The previous prime is 1111120002089. The next prime is 1111120002127. The reversal of 1111120002121 is 1212000211111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1111120002121 - 2⁵ = 1111120002089 is a prime.

It is a super-2 number, since 2×1111120002121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111120002127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40755435 + ... + 40782688.

It is an arithmetic number, because the mean of its divisors is an integer number (277800388468).

Almost surely, 2^{1111120002121} is an apocalyptic number.

It is an amenable number.

1111120002121 is a deficient number, since it is larger than the sum of its proper divisors (81551751).

1111120002121 is an equidigital number, since it uses as much as digits as its factorization.

1111120002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81551750.

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

Adding to 1111120002121 its reverse (1212000211111), we get a palindrome (2323120213232).

The spelling of 1111120002121 in words is "one trillion, one hundred eleven billion, one hundred twenty million, two thousand, one hundred twenty-one".