11431221004 has 24 divisors (see below), whose sum is σ = 22871616768. Its totient is φ = 4897128720.

The previous prime is 11431221001. The next prime is 11431221059. The reversal of 11431221004 is 40012213411.

It is not an unprimeable number, because it can be changed into a prime (11431221001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9784 + ... + 151519.

It is an arithmetic number, because the mean of its divisors is an integer number (952984032).

Almost surely, 2^11431221004 is an apocalyptic number.

11431221004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11431221004 is an abundant number, since it is smaller than the sum of its proper divisors (11440395764).

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

11431221004 is a wasteful number, since it uses less digits than its factorization.

11431221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163845 (or 163843 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11431221004 its reverse (40012213411), we get a palindrome (51443434415).

The spelling of 11431221004 in words is "eleven billion, four hundred thirty-one million, two hundred twenty-one thousand, four".