21002001310 has 16 divisors (see below), whose sum is σ = 39793266000. Its totient is φ = 7958653056.

The previous prime is 21002001281. The next prime is 21002001337. The reversal of 21002001310 is 1310020012.

It is a super-2 number, since 2×21002001310² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 55268235 + ... + 55268614.

It is an arithmetic number, because the mean of its divisors is an integer number (2487079125).

Almost surely, 2^21002001310 is an apocalyptic number.

21002001310 is a deficient number, since it is larger than the sum of its proper divisors (18791264690).

21002001310 is a wasteful number, since it uses less digits than its factorization.

21002001310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110536875.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21002001310 its reverse (1310020012), we get a palindrome (22312021322).

The spelling of 21002001310 in words is "twenty-one billion, two million, one thousand, three hundred ten".