21003012310 has 16 divisors (see below), whose sum is σ = 43206196896. Its totient is φ = 7201032768.

The previous prime is 21003012293. The next prime is 21003012353. The reversal of 21003012310 is 1321030012.

It is a super-2 number, since 2×21003012310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150021447 + ... + 150021586.

It is an arithmetic number, because the mean of its divisors is an integer number (2700387306).

Almost surely, 2^21003012310 is an apocalyptic number.

21003012310 is an abundant number, since it is smaller than the sum of its proper divisors (22203184586).

21003012310 is a wasteful number, since it uses less digits than its factorization.

21003012310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300043047.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21003012310 its reverse (1321030012), we get a palindrome (22324042322).

The spelling of 21003012310 in words is "twenty-one billion, three million, twelve thousand, three hundred ten".