21343121410 has 32 divisors (see below), whose sum is σ = 43806519792. Its totient is φ = 7416975360.

The previous prime is 21343121407. The next prime is 21343121431. The reversal of 21343121410 is 1412134312.

It can be written as a sum of positive squares in 8 ways, for example, as 14120331241 + 7222790169 = 118829^2 + 84987^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4826551 + ... + 4830970.

Almost surely, 2^21343121410 is an apocalyptic number.

21343121410 is an abundant number, since it is smaller than the sum of its proper divisors (22463398382).

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

21343121410 is a wasteful number, since it uses less digits than its factorization.

21343121410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9657558.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21343121410 its reverse (1412134312), we get a palindrome (22755255722).

The spelling of 21343121410 in words is "twenty-one billion, three hundred forty-three million, one hundred twenty-one thousand, four hundred ten".