21131133143344 has 40 divisors (see below), whose sum is σ = 47878514309120. Its totient is φ = 8845590616128.

The previous prime is 21131133143321. The next prime is 21131133143401. The reversal of 21131133143344 is 44334133113112.

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, 2193842064 + ... + 2193851695.

It is an arithmetic number, because the mean of its divisors is an integer number (1196962857728).

Almost surely, 2^{21131133143344} is an apocalyptic number.

It is an amenable number.

21131133143344 is an abundant number, since it is smaller than the sum of its proper divisors (26747381165776).

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

21131133143344 is a wasteful number, since it uses less digits than its factorization.

21131133143344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387693817 (or 4387693811 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

Adding to 21131133143344 its reverse (44334133113112), we get a palindrome (65465266256456).

The spelling of 21131133143344 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred thirty-three million, one hundred forty-three thousand, three hundred forty-four".