1011112221121 has 8 divisors (see below), whose sum is σ = 1013572072800. Its totient is φ = 1008652592640.

The previous prime is 1011112221103. The next prime is 1011112221131. The reversal of 1011112221121 is 1211222111101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011112221121 - 2⁹ = 1011112220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011112221095 and 1011112221104.

It is not an unprimeable number, because it can be changed into a prime (1011112221101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12348606 + ... + 12430216.

It is an arithmetic number, because the mean of its divisors is an integer number (126696509100).

Almost surely, 2^{1011112221121} is an apocalyptic number.

It is an amenable number.

1011112221121 is a deficient number, since it is larger than the sum of its proper divisors (2459851679).

1011112221121 is an equidigital number, since it uses as much as digits as its factorization.

1011112221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111599.

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

Adding to 1011112221121 its reverse (1211222111101), we get a palindrome (2222334332222).

It can be divided in two parts, 101111 and 2221121, that added together give a palindrome (2322232).

The spelling of 1011112221121 in words is "one trillion, eleven billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".