21021241310 has 32 divisors (see below), whose sum is σ = 39241812960. Its totient is φ = 8098054272.

The previous prime is 21021241303. The next prime is 21021241331. The reversal of 21021241310 is 1314212012.

It is a super-2 number, since 2×21021241310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23837 + ... + 206423.

It is an arithmetic number, because the mean of its divisors is an integer number (1226306655).

Almost surely, 2^21021241310 is an apocalyptic number.

21021241310 is a deficient number, since it is larger than the sum of its proper divisors (18220571650).

21021241310 is a wasteful number, since it uses less digits than its factorization.

21021241310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183020.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21021241310 its reverse (1314212012), we get a palindrome (22335453322).

The spelling of 21021241310 in words is "twenty-one billion, twenty-one million, two hundred forty-one thousand, three hundred ten".