21621352003141 has 16 divisors (see below), whose sum is σ = 23596090979328. Its totient is φ = 19648141110000.

The previous prime is 21621352003117. The next prime is 21621352003159. The reversal of 21621352003141 is 14130025312612.

It is a cyclic number.

It is not a de Polignac number, because 21621352003141 - 2¹⁵ = 21621351970373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621353003141) 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, 534064486 + ... + 534104968.

It is an arithmetic number, because the mean of its divisors is an integer number (1474755686208).

Almost surely, 2^{21621352003141} is an apocalyptic number.

It is an amenable number.

21621352003141 is a deficient number, since it is larger than the sum of its proper divisors (1974738976187).

21621352003141 is a wasteful number, since it uses less digits than its factorization.

21621352003141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58152.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 21621352003141 its reverse (14130025312612), we get a palindrome (35751377315753).

The spelling of 21621352003141 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred fifty-two million, three thousand, one hundred forty-one".