1011651111161 has 4 divisors (see below), whose sum is σ = 1035177881232. Its totient is φ = 988124341092.

The previous prime is 1011651111101. The next prime is 1011651111209. The reversal of 1011651111161 is 1611111561101.

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 1011651111161 - 2¹⁰ = 1011651110137 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 1011651111161.

It is not an unprimeable number, because it can be changed into a prime (1011651111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11763384971 + ... + 11763385056.

It is an arithmetic number, because the mean of its divisors is an integer number (258794470308).

Almost surely, 2^{1011651111161} is an apocalyptic number.

It is an amenable number.

1011651111161 is a deficient number, since it is larger than the sum of its proper divisors (23526770071).

1011651111161 is an equidigital number, since it uses as much as digits as its factorization.

1011651111161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23526770070.

The product of its (nonzero) digits is 180, while the sum is 26.

Adding to 1011651111161 its reverse (1611111561101), we get a palindrome (2622762672262).

The spelling of 1011651111161 in words is "one trillion, eleven billion, six hundred fifty-one million, one hundred eleven thousand, one hundred sixty-one".