21012142310 has 32 divisors (see below), whose sum is σ = 38139491520. Its totient is φ = 8334525568.

The previous prime is 21012142297. The next prime is 21012142321. The reversal of 21012142310 is 1324121012.

It is a super-2 number, since 2×21012142310² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657359 + ... + 688581.

It is an arithmetic number, because the mean of its divisors is an integer number (1191859110).

Almost surely, 2^21012142310 is an apocalyptic number.

21012142310 is a deficient number, since it is larger than the sum of its proper divisors (17127349210).

21012142310 is a wasteful number, since it uses less digits than its factorization.

21012142310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31792.

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

Adding to 21012142310 its reverse (1324121012), we get a palindrome (22336263322).

The spelling of 21012142310 in words is "twenty-one billion, twelve million, one hundred forty-two thousand, three hundred ten".