1511112001121 has 2 divisors, whose sum is σ = 1511112001122. Its totient is φ = 1511112001120.

The previous prime is 1511112001103. The next prime is 1511112001207. The reversal of 1511112001121 is 1211002111151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 866688383521 + 644423617600 = 930961^2 + 802760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1511112001121 - 2³⁰ = 1510038259297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1511112001121.

It is not a weakly prime, because it can be changed into another prime (1511112001921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 755556000560 + 755556000561.

It is an arithmetic number, because the mean of its divisors is an integer number (755556000561).

Almost surely, 2^{1511112001121} is an apocalyptic number.

It is an amenable number.

1511112001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1511112001121 is an equidigital number, since it uses as much as digits as its factorization.

1511112001121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 17.

Adding to 1511112001121 its reverse (1211002111151), we get a palindrome (2722114112272).

The spelling of 1511112001121 in words is "one trillion, five hundred eleven billion, one hundred twelve million, one thousand, one hundred twenty-one".