1215411443011 has 4 divisors (see below), whose sum is σ = 1217886823224. Its totient is φ = 1212936062800.

The previous prime is 1215411442997. The next prime is 1215411443027. The reversal of 1215411443011 is 1103441145121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1215411443011 - 2¹⁵ = 1215411410243 is a prime.

It is a super-2 number, since 2×1215411443011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215411443041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237689370 + ... + 1237690351.

It is an arithmetic number, because the mean of its divisors is an integer number (304471705806).

Almost surely, 2^{1215411443011} is an apocalyptic number.

1215411443011 is a deficient number, since it is larger than the sum of its proper divisors (2475380213).

1215411443011 is an equidigital number, since it uses as much as digits as its factorization.

1215411443011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475380212.

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 1215411443011 its reverse (1103441145121), we get a palindrome (2318852588132).

The spelling of 1215411443011 in words is "one trillion, two hundred fifteen billion, four hundred eleven million, four hundred forty-three thousand, eleven".