1111051161 has 72 divisors (see below), whose sum is σ = 1893877440. Its totient is φ = 649645920.

The previous prime is 1111051121. The next prime is 1111051177. The reversal of 1111051161 is 1611501111.

It is a happy number.

It is not a de Polignac number, because 1111051161 - 2⁷ = 1111051033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1111051111) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 852036 + ... + 853338.

Almost surely, 2^1111051161 is an apocalyptic number.

1111051161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111051161 is a deficient number, since it is larger than the sum of its proper divisors (782826279).

1111051161 is a wasteful number, since it uses less digits than its factorization.

1111051161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1346 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

The square root of 1111051161 is about 33332.4340695365. The cubic root of 1111051161 is about 1035.7255404229.

Adding to 1111051161 its reverse (1611501111), we get a palindrome (2722552272).

The spelling of 1111051161 in words is "one billion, one hundred eleven million, fifty-one thousand, one hundred sixty-one".