21351304222410 has 64 divisors (see below), whose sum is σ = 53282237819904. Its totient is φ = 5469794880000.

The previous prime is 21351304222331. The next prime is 21351304222427. The reversal of 21351304222410 is 1422240315312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83662341 + ... + 83917160.

It is an arithmetic number, because the mean of its divisors is an integer number (832534965936).

Almost surely, 2^{21351304222410} is an apocalyptic number.

21351304222410 is an abundant number, since it is smaller than the sum of its proper divisors (31930933597494).

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

21351304222410 is a wasteful number, since it uses less digits than its factorization.

21351304222410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167579679.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 21351304222410 its reverse (1422240315312), we get a palindrome (22773544537722).

The spelling of 21351304222410 in words is "twenty-one trillion, three hundred fifty-one billion, three hundred four million, two hundred twenty-two thousand, four hundred ten".