1131121612 has 12 divisors (see below), whose sum is σ = 2027742696. Its totient is φ = 551766560.

The previous prime is 1131121573. The next prime is 1131121631. The reversal of 1131121612 is 2161211311.

It is a super-2 number, since 2×1131121612² = 2558872202266957088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1131121612.

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, 3448378 + ... + 3448705.

It is an arithmetic number, because the mean of its divisors is an integer number (168978558).

Almost surely, 2^1131121612 is an apocalyptic number.

It is an amenable number.

1131121612 is a deficient number, since it is larger than the sum of its proper divisors (896621084).

1131121612 is a wasteful number, since it uses less digits than its factorization.

1131121612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6897128 (or 6897126 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

The square root of 1131121612 is about 33632.1514625514. The cubic root of 1131121612 is about 1041.9249396088.

Adding to 1131121612 its reverse (2161211311), we get a palindrome (3292332923).

It can be divided in two parts, 11311 and 21612, that added together give a palindrome (32923).

The spelling of 1131121612 in words is "one billion, one hundred thirty-one million, one hundred twenty-one thousand, six hundred twelve".