1121231012 has 18 divisors (see below), whose sum is σ = 2156749014. Its totient is φ = 509650240.

The previous prime is 1121231003. The next prime is 1121231053. The reversal of 1121231012 is 2101321211.

It can be written as a sum of positive squares in only one way, i.e., 1013403556 + 107827456 = 31834^2 + 10384^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1157813 + ... + 1158780.

Almost surely, 2^1121231012 is an apocalyptic number.

It is an amenable number.

1121231012 is a deficient number, since it is larger than the sum of its proper divisors (1035518002).

1121231012 is a wasteful number, since it uses less digits than its factorization.

1121231012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316619 (or 2316606 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1121231012 is about 33484.7877699710. The cubic root of 1121231012 is about 1038.8791585914.

Adding to 1121231012 its reverse (2101321211), we get a palindrome (3222552223).

It can be divided in two parts, 11212 and 31012, that added together give a palindrome (42224).

The spelling of 1121231012 in words is "one billion, one hundred twenty-one million, two hundred thirty-one thousand, twelve".