21041053412216 has 16 divisors (see below), whose sum is σ = 41772679568640. Its totient is φ = 9901672193920.

The previous prime is 21041053412209. The next prime is 21041053412227. The reversal of 21041053412216 is 61221435014012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77356813880 + ... + 77356814151.

It is an arithmetic number, because the mean of its divisors is an integer number (2610792473040).

Almost surely, 2^{21041053412216} is an apocalyptic number.

It is an amenable number.

21041053412216 is a deficient number, since it is larger than the sum of its proper divisors (20731626156424).

21041053412216 is a wasteful number, since it uses less digits than its factorization.

21041053412216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154713628054 (or 154713628050 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 21041053412216 its reverse (61221435014012), we get a palindrome (82262488426228).

The spelling of 21041053412216 in words is "twenty-one trillion, forty-one billion, fifty-three million, four hundred twelve thousand, two hundred sixteen".