21401220310 has 16 divisors (see below), whose sum is σ = 38737407600. Its totient is φ = 8512663456.

The previous prime is 21401220307. The next prime is 21401220331. The reversal of 21401220310 is 1302210412.

It is a super-2 number, since 2×21401220310² (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, 5976205 + ... + 5979784.

It is an arithmetic number, because the mean of its divisors is an integer number (2421087975).

Almost surely, 2^21401220310 is an apocalyptic number.

21401220310 is a deficient number, since it is larger than the sum of its proper divisors (17336187290).

21401220310 is a wasteful number, since it uses less digits than its factorization.

21401220310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11956175.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21401220310 its reverse (1302210412), we get a palindrome (22703430722).

The spelling of 21401220310 in words is "twenty-one billion, four hundred one million, two hundred twenty thousand, three hundred ten".