21231405110 has 32 divisors (see below), whose sum is σ = 40080629952. Its totient is φ = 8082067840.

The previous prime is 21231405073. The next prime is 21231405121. The reversal of 21231405110 is 1150413212.

It is a super-2 number, since 2×21231405110² (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 15 ways as a sum of consecutive naturals, for example, 188981 + ... + 279600.

It is an arithmetic number, because the mean of its divisors is an integer number (1252519686).

Almost surely, 2^21231405110 is an apocalyptic number.

21231405110 is a deficient number, since it is larger than the sum of its proper divisors (18849224842).

21231405110 is a wasteful number, since it uses less digits than its factorization.

21231405110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468808.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21231405110 its reverse (1150413212), we get a palindrome (22381818322).

The spelling of 21231405110 in words is "twenty-one billion, two hundred thirty-one million, four hundred five thousand, one hundred ten".