1131121738 has 32 divisors (see below), whose sum is σ = 1854996480. Its totient is φ = 515663280.

The previous prime is 1131121721. The next prime is 1131121757. The reversal of 1131121738 is 8371211311.

It is a super-2 number, since 2×1131121738² = 2558872772352281288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89623 + ... + 101461.

It is an arithmetic number, because the mean of its divisors is an integer number (57968640).

Almost surely, 2^1131121738 is an apocalyptic number.

1131121738 is a deficient number, since it is larger than the sum of its proper divisors (723874742).

1131121738 is a wasteful number, since it uses less digits than its factorization.

1131121738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11962.

The product of its digits is 1008, while the sum is 28.

The square root of 1131121738 is about 33632.1533357589. The cubic root of 1131121738 is about 1041.9249782968.

The spelling of 1131121738 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, seven hundred thirty-eight".