21012010310 has 16 divisors (see below), whose sum is σ = 37823343552. Its totient is φ = 8404420800.

The previous prime is 21012010259. The next prime is 21012010361. The reversal of 21012010310 is 1301021012.

It is an interprime number because it is at equal distance from previous prime (21012010259) and next prime (21012010361).

It is a super-2 number, since 2×21012010310² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012010291 and 21012010300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308675 + ... + 370545.

It is an arithmetic number, because the mean of its divisors is an integer number (2363958972).

Almost surely, 2^21012010310 is an apocalyptic number.

21012010310 is a deficient number, since it is larger than the sum of its proper divisors (16811333242).

21012010310 is a wasteful number, since it uses less digits than its factorization.

21012010310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95839.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21012010310 its reverse (1301021012), we get a palindrome (22313031322).

The spelling of 21012010310 in words is "twenty-one billion, twelve million, ten thousand, three hundred ten".