21621361500141 has 32 divisors (see below), whose sum is σ = 31773141751680. Its totient is φ = 12997448116224.

The previous prime is 21621361500139. The next prime is 21621361500149. The reversal of 21621361500141 is 14100516312612.

It is not a de Polignac number, because 21621361500141 - 2¹ = 21621361500139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621361500149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37236876 + ... + 37813061.

It is an arithmetic number, because the mean of its divisors is an integer number (992910679740).

Almost surely, 2^{21621361500141} is an apocalyptic number.

It is an amenable number.

21621361500141 is a deficient number, since it is larger than the sum of its proper divisors (10151780251539).

21621361500141 is a wasteful number, since it uses less digits than its factorization.

21621361500141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75050125.

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 21621361500141 its reverse (14100516312612), we get a palindrome (35721877812753).

The spelling of 21621361500141 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred sixty-one million, five hundred thousand, one hundred forty-one".