21224340131404 has 24 divisors (see below), whose sum is σ = 37158943697568. Its totient is φ = 10607499678720.

The previous prime is 21224340131327. The next prime is 21224340131413. The reversal of 21224340131404 is 40413104342212.

It is a happy number.

It is a super-2 number, since 2×21224340131404² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158582994 + ... + 158716774.

It is an arithmetic number, because the mean of its divisors is an integer number (1548289320732).

Almost surely, 2^{21224340131404} is an apocalyptic number.

It is an amenable number.

21224340131404 is a deficient number, since it is larger than the sum of its proper divisors (15934603566164).

21224340131404 is a wasteful number, since it uses less digits than its factorization.

21224340131404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150945 (or 150943 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21224340131404 its reverse (40413104342212), we get a palindrome (61637444473616).

The spelling of 21224340131404 in words is "twenty-one trillion, two hundred twenty-four billion, three hundred forty million, one hundred thirty-one thousand, four hundred four".