21214041231554 has 8 divisors (see below), whose sum is σ = 32597185307148. Its totient is φ = 10348312795840.

The previous prime is 21214041231533. The next prime is 21214041231557. The reversal of 21214041231554 is 45513214041212.

It can be written as a sum of positive squares in 2 ways, for example, as 21054102825625 + 159938405929 = 4588475^2 + 399923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21214041231557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129353909867 + ... + 129353910030.

Almost surely, 2^{21214041231554} is an apocalyptic number.

21214041231554 is a deficient number, since it is larger than the sum of its proper divisors (11383144075594).

21214041231554 is a wasteful number, since it uses less digits than its factorization.

21214041231554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258707819940.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 21214041231554 its reverse (45513214041212), we get a palindrome (66727255272766).

The spelling of 21214041231554 in words is "twenty-one trillion, two hundred fourteen billion, forty-one million, two hundred thirty-one thousand, five hundred fifty-four".