1111551234121 has 16 divisors (see below), whose sum is σ = 1228463280000. Its totient is φ = 1000390710528.

The previous prime is 1111551234107. The next prime is 1111551234163. The reversal of 1111551234121 is 1214321551111.

It is not a de Polignac number, because 1111551234121 - 2²⁷ = 1111417016393 is a prime.

It is a super-2 number, since 2×1111551234121² (a number of 25 digits) contains 22 as substring.

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 1111551234121.

It is not an unprimeable number, because it can be changed into a prime (1111551234181) 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, 946630 + ... + 1766128.

It is an arithmetic number, because the mean of its divisors is an integer number (76778955000).

Almost surely, 2^{1111551234121} is an apocalyptic number.

It is an amenable number.

1111551234121 is a deficient number, since it is larger than the sum of its proper divisors (116912045879).

1111551234121 is a wasteful number, since it uses less digits than its factorization.

1111551234121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823008.

The product of its digits is 1200, while the sum is 28.

Adding to 1111551234121 its reverse (1214321551111), we get a palindrome (2325872785232).

The spelling of 1111551234121 in words is "one trillion, one hundred eleven billion, five hundred fifty-one million, two hundred thirty-four thousand, one hundred twenty-one".