1611111000001 has 4 divisors (see below), whose sum is σ = 1612390676400. Its totient is φ = 1609831323604.

The previous prime is 1611110999977. The next prime is 1611111000089. The reversal of 1611111000001 is 1000001111161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1611111000001 - 2⁵ = 1611110999969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611111000101) 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, 639836311 + ... + 639838828.

It is an arithmetic number, because the mean of its divisors is an integer number (403097669100).

Almost surely, 2^{1611111000001} is an apocalyptic number.

It is an amenable number.

1611111000001 is a deficient number, since it is larger than the sum of its proper divisors (1279676399).

1611111000001 is a wasteful number, since it uses less digits than its factorization.

1611111000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279676398.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 1611111000001 its reverse (1000001111161), we get a palindrome (2611112111162).

The spelling of 1611111000001 in words is "one trillion, six hundred eleven billion, one hundred eleven million, one", and thus it is an aban number.