21234334110440 has 64 divisors (see below), whose sum is σ = 52121231352000. Its totient is φ = 7721488176640.

The previous prime is 21234334110433. The next prime is 21234334110499. The reversal of 21234334110440 is 4401143343212.

It is a super-2 number, since 2×21234334110440² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21234334110397 and 21234334110406.

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, 48118316 + ... + 48557604.

It is an arithmetic number, because the mean of its divisors is an integer number (814394239875).

Almost surely, 2^{21234334110440} is an apocalyptic number.

21234334110440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21234334110440 is an abundant number, since it is smaller than the sum of its proper divisors (30886897241560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234334110440 is a wasteful number, since it uses less digits than its factorization.

21234334110440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549170 (or 549166 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21234334110440 its reverse (4401143343212), we get a palindrome (25635477453652).

The spelling of 21234334110440 in words is "twenty-one trillion, two hundred thirty-four billion, three hundred thirty-four million, one hundred ten thousand, four hundred forty".