1011120156 has 18 divisors (see below), whose sum is σ = 2555887152. Its totient is φ = 337040040.

The previous prime is 1011120137. The next prime is 1011120163. The reversal of 1011120156 is 6510211101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14043300 + ... + 14043371.

Almost surely, 2^1011120156 is an apocalyptic number.

It is an amenable number.

1011120156 is an abundant number, since it is smaller than the sum of its proper divisors (1544766996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011120156 is a wasteful number, since it uses less digits than its factorization.

1011120156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28086681 (or 28086676 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 1011120156 is about 31798.1156045449. The cubic root of 1011120156 is about 1003.6930631616.

Adding to 1011120156 its reverse (6510211101), we get a palindrome (7521331257).

The spelling of 1011120156 in words is "one billion, eleven million, one hundred twenty thousand, one hundred fifty-six".