1011112222121 has 8 divisors (see below), whose sum is σ = 1017383986944. Its totient is φ = 1004841294480.

The previous prime is 1011112222093. The next prime is 1011112222157. The reversal of 1011112222121 is 1212222111101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011112222121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011112222121.

It is not an unprimeable number, because it can be changed into a prime (1011112222621) 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, 2307215 + ... + 2710251.

It is an arithmetic number, because the mean of its divisors is an integer number (127172998368).

Almost surely, 2^{1011112222121} is an apocalyptic number.

It is an amenable number.

1011112222121 is a deficient number, since it is larger than the sum of its proper divisors (6271764823).

1011112222121 is a wasteful number, since it uses less digits than its factorization.

1011112222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418591.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1011112222121 its reverse (1212222111101), we get a palindrome (2223334333222).

It can be divided in two parts, 101111 and 2222121, that added together give a palindrome (2323232).

The spelling of 1011112222121 in words is "one trillion, eleven billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".