21053210234361 has 16 divisors (see below), whose sum is σ = 29840594228928. Its totient is φ = 13157228480000.

The previous prime is 21053210234351. The next prime is 21053210234401. The reversal of 21053210234361 is 16343201235012.

It is a cyclic number.

It is not a de Polignac number, because 21053210234361 - 2⁹ = 21053210233849 is a prime.

It is a super-3 number, since 3×21053210234361³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21053210234311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822313980 + ... + 822339581.

It is an arithmetic number, because the mean of its divisors is an integer number (1865037139308).

Almost surely, 2^{21053210234361} is an apocalyptic number.

It is an amenable number.

21053210234361 is a deficient number, since it is larger than the sum of its proper divisors (8787383994567).

21053210234361 is a wasteful number, since it uses less digits than its factorization.

21053210234361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644653832.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 21053210234361 its reverse (16343201235012), we get a palindrome (37396411469373).

The spelling of 21053210234361 in words is "twenty-one trillion, fifty-three billion, two hundred ten million, two hundred thirty-four thousand, three hundred sixty-one".