11111000012121 has 16 divisors (see below), whose sum is σ = 14832477000000. Its totient is φ = 7398432673728.

The previous prime is 11111000012113. The next prime is 11111000012141. The reversal of 11111000012121 is 12121000011111.

It is not a de Polignac number, because 11111000012121 - 2³ = 11111000012113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111000012097 and 11111000012106.

It is not an unprimeable number, because it can be changed into a prime (11111000012141) 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, 9372255 + ... + 10491003.

It is an arithmetic number, because the mean of its divisors is an integer number (927029812500).

Almost surely, 2^{11111000012121} is an apocalyptic number.

It is an amenable number.

11111000012121 is a deficient number, since it is larger than the sum of its proper divisors (3721476987879).

11111000012121 is a wasteful number, since it uses less digits than its factorization.

11111000012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122728.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11111000012121 its reverse (12121000011111), we get a palindrome (23232000023232).

The spelling of 11111000012121 in words is "eleven trillion, one hundred eleven billion, twelve thousand, one hundred twenty-one".