1121165156 has 12 divisors (see below), whose sum is σ = 1986875520. Its totient is φ = 553486440.

The previous prime is 1121165117. The next prime is 1121165161. The reversal of 1121165156 is 6515611211.

It is a super-2 number, since 2×1121165156² = 2514022614057008672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1773680 + ... + 1774311.

It is an arithmetic number, because the mean of its divisors is an integer number (165572960).

Almost surely, 2^1121165156 is an apocalyptic number.

It is an amenable number.

1121165156 is a deficient number, since it is larger than the sum of its proper divisors (865710364).

1121165156 is a wasteful number, since it uses less digits than its factorization.

1121165156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548074 (or 3548072 counting only the distinct ones).

The product of its digits is 1800, while the sum is 29.

The square root of 1121165156 is about 33483.8043836121. The cubic root of 1121165156 is about 1038.8588185174.

Adding to 1121165156 its reverse (6515611211), we get a palindrome (7636776367).

It can be divided in two parts, 11211 and 65156, that added together give a palindrome (76367).

The spelling of 1121165156 in words is "one billion, one hundred twenty-one million, one hundred sixty-five thousand, one hundred fifty-six".