21421140310 has 16 divisors (see below), whose sum is σ = 38560363056. Its totient is φ = 8567942688.

The previous prime is 21421140281. The next prime is 21421140329. The reversal of 21421140310 is 1304112412.

It is a super-2 number, since 2×21421140310² (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 7 ways as a sum of consecutive naturals, for example, 142849 + ... + 251491.

It is an arithmetic number, because the mean of its divisors is an integer number (2410022691).

Almost surely, 2^21421140310 is an apocalyptic number.

21421140310 is a deficient number, since it is larger than the sum of its proper divisors (17139222746).

21421140310 is a wasteful number, since it uses less digits than its factorization.

21421140310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128367.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21421140310 its reverse (1304112412), we get a palindrome (22725252722).

The spelling of 21421140310 in words is "twenty-one billion, four hundred twenty-one million, one hundred forty thousand, three hundred ten".