1121431404 has 12 divisors (see below), whose sum is σ = 2616673304. Its totient is φ = 373810464.

The previous prime is 1121431403. The next prime is 1121431411. The reversal of 1121431404 is 4041341211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1121431404² = 2515216787754822432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121431403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46726297 + ... + 46726320.

Almost surely, 2^1121431404 is an apocalyptic number.

It is an amenable number.

1121431404 is an abundant number, since it is smaller than the sum of its proper divisors (1495241900).

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

1121431404 is a wasteful number, since it uses less digits than its factorization.

1121431404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93452624 (or 93452622 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1121431404 is about 33487.7799204426. The cubic root of 1121431404 is about 1038.9410461266.

Adding to 1121431404 its reverse (4041341211), we get a palindrome (5162772615).

The spelling of 1121431404 in words is "one billion, one hundred twenty-one million, four hundred thirty-one thousand, four hundred four".