21440515041012 has 96 divisors (see below), whose sum is σ = 52148555956224. Its totient is φ = 6848422963200.

The previous prime is 21440515040999. The next prime is 21440515041041. The reversal of 21440515041012 is 21014051504412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453292948 + ... + 453340244.

It is an arithmetic number, because the mean of its divisors is an integer number (543214124544).

Almost surely, 2^{21440515041012} is an apocalyptic number.

It is an amenable number.

21440515041012 is an abundant number, since it is smaller than the sum of its proper divisors (30708040915212).

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

21440515041012 is a wasteful number, since it uses less digits than its factorization.

21440515041012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59269 (or 59267 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 21440515041012 its reverse (21014051504412), we get a palindrome (42454566545424).

The spelling of 21440515041012 in words is "twenty-one trillion, four hundred forty billion, five hundred fifteen million, forty-one thousand, twelve".