1111000021121 has 4 divisors (see below), whose sum is σ = 1116582936000. Its totient is φ = 1105417106244.

The previous prime is 1111000021111. The next prime is 1111000021127. The reversal of 1111000021121 is 1211200001111.

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 1111000021121 - 2⁶ = 1111000021057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111000021127) 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, 2791457141 + ... + 2791457538.

It is an arithmetic number, because the mean of its divisors is an integer number (279145734000).

Almost surely, 2^{1111000021121} is an apocalyptic number.

It is an amenable number.

1111000021121 is a deficient number, since it is larger than the sum of its proper divisors (5582914879).

1111000021121 is an equidigital number, since it uses as much as digits as its factorization.

1111000021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582914878.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1111000021121 its reverse (1211200001111), we get a palindrome (2322200022232).

The spelling of 1111000021121 in words is "one trillion, one hundred eleven billion, twenty-one thousand, one hundred twenty-one".